SCIENTIFIC ABSTRACT YAVICH, L. R. - YAVLENSKIY, S. D.

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• Collection: Scientific Abstracts
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• Document Creation Date: November 2, 2016
• Document Release Date: September 19, 2001
• Sequence Number: 15
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

109-7-6/17
Image Matrices of a. Quadripole.
reactive quadripoles the scattering matrix can be expressed
as shown in Eq.(27) so.that its elements fulfil the relation-
ship given by Eqs.~28). The so-called transfer matrix of a'-
system is defined see EQ-130) ) and the-relationship be-
tween its coefficients and those of the scattering, imyed-
ancet admittance and the mixed matrices is considered see
Tables 3 and 4, P'.876). A practical application of the
matrices is explained by means of an example (see Fig~.6)
which considers a waveguide filter consisting of two identi-
cal discontinuities separated by mean of a waveguide section
operati.qg with an H -type wave. The transmission matrix of
the filtbr is give~12Y,Eq~(36) and the modulus of its reflec-
tion coefficient by lq.(37)'. Expressions for the scattering
and transmission matrices of some simple systems are given in
the appendix (pp*.880-881)', There are 8 figures, 8 tables and
.13 references, of which 6 are Slavic.
SUIRMITTED: December 100 1956's
AVAILABLE:, Library of Congress.
Card 3/3

/C /Y/
AUTHOR: Yavi ch, L.R.
T I T LIE Mae FroW-eii-sin the Desi3n of Wideband Spark Gans
(RokotoryW voprosy proyoktirovw-iiya shirolzopolosiily.~~-.','.
razryaC,niixv-)
PERIODICAL: Radiotcl~hnika i Elektronika, 1958, Vol.IIII Yr 11
94-104 (USSR)
ABSTRACT: The paper is concerned with the desiGn of the raceiver
prot-ectin- devices for ultrahigh frequencies. It io
assumed that for a -iven frequency band the protoctin-
device Should enploy the resonant elements chosen in ruch
a way as to obtain a minimum reflection coefficient. A
5-stage protecting device (duplexer) is considered. it is
assumed that it is situated in a waveguide propar-atin- an
H wave (see Fi-.1). It is further assimed that all the
10 0 1
resonant elements have the same resonant wavelenn-th, X01
ca
and are situated at equal distances, f:oom each other,
such that t = 1/4 the resonant wavelength in the waveoaide.
C3
The losses in the resonant elements and in the connectinG
limks arc no-loctod, It is shoval that tile duple-X.cr 3,Y"Ston
Card 1/5

109-1-11/18
Some Problems in the Design of Wideband Spark Gaps
of Fig.1 can be represented by an equivalent filter circuit
shown in Fi,-).3, in which the relatiomships between the
Q-factors of the resonant elements and those of the elements
of the network of FiC~.3 arc e~zpressed by Eqs.(5), while
Q,, is civen by Eq.(4); X130 in Eq.(11.) denotes tho rjsonant
wavelength in the wavoguide. The normalised conductances
C?
of the parallel branches Bp factors of the parallei
circuits QPH , normalised resistances of the series
branches XP_, and the effective Q factors of the series
circuits Q,)-l H for the circuit of Fig.3 are expressed by
Eqs.(G) and (75 which can appro:cimately be represented by
Bqs.(8) and (9), where AP and Af are given by Eqs.(10)
and (11). The problem of the synthesis of the ladder net-
works of the type shovm in FiS.-9, for a minimum -reflection
coefficient over a given frequoncy band, was c3nsidered by
Bode (Ref.L~) and Fano (Ref.5). The problera. was also in-
vestigated by the author in an earlier pv-per (Raf.G'). In
the above worics it was found that the optimum reflection
coefficient can be expressed by:
Card 2/5

some Problems in -the Design of Wideband Spark Gaps
Sll on-r ~- '_ *BIM , (12)
where B IM is the maximum normalised conductivity of the
first resonant circuit which is Siven by:
B lm (13)
Eq.(12) is true for a network(Dnsisting of an infinite
number of stages. For the nehvorks with a limited number
of stages, Fano (Ref.5) based the solution on the Chebyshev
approximation and derived a number of formulae which deter-
mine the relationship between the effective Q, factors
and other parameters of the first 4 elements of the cir-
cuits in Fig.3. The formulae are expressed by Eq.;.(14) to
(21), in which n is the nLLmber of resonant circuits in
the network, a, b, a 31 a51 a? are auxiliary coc-f.Zicients;
11V 00 00 00
Al A3 1 A 5and A 7 are the Taylor series coefficients.
Card 3/5
19-
-97". gg~z-!i 4" "T5

109-1-11/18
Some Problems in the Design of Wideband 3park Ga-ps
In order to obtain a minimum reflection coefficient -the
network should also fulfil the condition representod by
From the solution of Eqs.(14) 11
Eq.(27). 4nd (2?) it is
possible -to obtain optimum values of the coefficient-s a
and b as a function of B for n ranging frDm 2 to 5.
The values of the reflection 11 coefficient S LD a2 a fuzet-
ion of for n is shown in Fig.5. Thilcoefficients
al I a2 03 and a,, as a function of BlM for various
n are evaluated on the basis of Eqs.(14) to (21) for the
optimum a and b and are plotted in Figs.6, 7 and 8. On
the basis of the above it is possible to design practical
duplexer networks. Two practical networks are designed.
One of thera has a relative bandwidth of 1056 and o-Darates at
a wavelength of 10 cm; the other one has the bandwidth of
2001o; in both cases the effective Q-factor of the first
element is 4.25, n = 5 and the waveguide cross-section is
a
72 x 34 mm. The reflection coefficient Sli aCainstj X
is plotted for both cases in Fig.10. The desi,-n aas also
Q
checked experimentally and the calculated results for
n = 3 Q1 X = 12 cm 5.43 and waveguicle
1H 0 0
ross-section 72 x 34 mm are shown in Fi-.11; curve 2
iznim
ma

Some Proble-ms in -the Desi,-,u oll' Wideb -and S'park, Gaos 109-1-11/18
represenlu-s the calculated and curve-3 the e::peri-uienLa1
results. The paper contains 11 'LiGures and 8 references, 4
o f vil arc En--lioh and 4 Ruosian, --id an appendi,,:,
Ach - ZZI
SUBIMITTED: February 7, 1957
AVAILABLE: Library of Congress
Card 5/5

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AUTHOR: YaAch 1 L - R. SOV/109-59-4-2-25/2-7
ITITLE: Application of the Wave Matrices for the Oalculation of
Transverse-Symmetrical quadripoles, (Primeneniye
volno7ykh matrits dlya rascheta chetyrekhpolyusnikov s
poperechnoy slmmetriyey)
PERIODICAL:Radiotekhnika i Elektronika, 1959, Vol 4, Nr 20
1 pp 341-344 (USSR)
ABSTRA,CT-.. It is pointed out that the calculation methods described
by the author in an earlier paper (Ref 1) can be
considerably simplified if the quadripole possesses a
vertical symmet--y. The simplified analysis can be done
if the quadripole (see Fig 1) can be split into two
image-reflected quadripoles I and II. The resulting
quadripole can then be considered as a cascaded system
of two identical quadripoles; it should be remembered,
however, that the transmission of energy in the
quadripole II takes place in the opposite direction to
that in the quadripole I. The transfer matrix of the
resulting quadripole can be expressed as
Card 1/3

SOV/109-59-4-2-25/27
Application of the Wave Watrices for the Calculation of Transverse-
Symmetrical Quadripoles
Til T12 Til -T21- T 2 -ill 2 -T T +T
11 12 11 21 12T22
[T3] T T -T T T 12 +T2
21 22 12 22 llT21--T22Tl2 -T21 22
(2)
where Tll, T129 T21 and T22 are the elements of the
transfer matrix when the energy is transmitted along the
quadx-ipole from the left to the right (see Fig 2).
From Eci (2) it is found that the reflection coefficient
in the syetem is given by Eq (3) and its -Lnsertion loss
is expressed by Eq (4). The above formulae are used to
determine the insertion loss and the modulus of the
reflection coefficient for a filter consisting of the
segments of coaxial lines having lengths 11 and 21 and
characteristic impedances PI and Pp (see Fig 3). &e
insertion loss is expressed by Eq Z8). The value of the
reflection coefficient is also determined for a
Card 2/3 quadripole which consists of two equal segments of
5

SOV/109-59-4-2-2,5/27
Application of the Wave Matrices for the Calculation of Transvierse-
Symmetrical Quadripoles
a line and three admittances (see Pig 4). The
reflection coefficient is expressed by Eq (14) in
-which c< and 0 are defined by Eq ~(15). The author
malwas aelmowledgment to R.Sh.Shakirova for her help.
There are 4 figures and 6 references of which 4 are Soviet
and 2 English.
SUBMITTED: 16th April 1958

SOV/109- - -4-3-25/38
AUTHORS; Felldshteynj A.L.9 Yavich, L.R.
TITLE: A Comparison of Step-like aii~dontinuous Line Sections
(K sravneniyu stupenchatykh i plavnykh perekhodov)
PERIODICAL: Radiotekhnika i Elektronika, Vol 4, Nr 3. 19592
pp 527-529 (USSR)
ABSTRACT: First, a Chebyshev-type step-like section (see Fig 1) is
considered. This device was investigated by a number of
authors (Refs 2,5,6 and 8). It is assumed that the
length of this type of line section, which consists of
n small steps is given by$
40 = -I- A2 n arc cosi 1
27( Cos
n
where Ap is the wavelength in the tran:lission line
corresponding to the "long-wave" boundary of the trans-
mission range; K is expressed by Eq (2), where R is
the ratio between the characteristic impedances of the
matched lines; h is the maximum deviation of the
Chebyshev polynomial from its zero value. When' n- in
Card 1/2 Eq (1) tends to infinity, the line section represents a
continuous transitiong and Eq (1) is in the form of

SOV/109- - -4-3-25/38
A Comparison of Step-iike and Continuous Line Sections
Eq (3). The problem consists of comparing values of 1 0,
as given by Eqs (1) and (3)1 for the same value of
R and the same value of the reflection coefficient.
The results are shown in Fig 1+ for various values of n
and t; the limiting case of a continuous transition
is represented by the dashed curves.
There are 5 figures and 8 references, 6 of which are
Card 2/2 Soviet and 2 English. One of the Soviet references is
translated from English.
SUBMITTED: September 18, 1958
E'

s/log/60/005/04/012/028
E140/E435
AUTHOR: "Yaulc-h,
TITLEa Certain Relationships for the Cascade Connection of
n Identical Irreversible Four-Terminal Networks
PERIODICALaRadlotekhnika i elektranikau 19609 Vol 59 Nr 4s
pp 633-637 (USSR)
ABSTRAM This is a continuation of previous work (Ref 6) And is
based on application of the"ideal power transformer"
introduced by Zelyakh (Ref 2). Using this and some
network theorems previously demonstrated (Ref 6), it im
shown that the cascade.connection of n identical
irreversible four-terminal networks can ba represented
by an equivalent circuit of n identical reversible
networks and a single ideal power transformer. Thtn
Wilson's theorem (Ref 1) may be used for rinding the
transmission matrix. There are 5 figures and 6 refersuzes,
5 of which are Soviet and 1 English.
SUBMITTEDs February 16, 1959
Card 1/1

69918
q. /'300 s/log/60/005/05/oo6/021
E140/E435
AUTHORS: Felldshteyn, A.L. and Yavich, L.R.
TITLE: The Calculation of Stepped Junctions with Maximally-
Flat Characteristics
PERIODICALi Radiotekhnika i elektronika, 1960, Vol 5, Nr 5,
P 762-770 (USSR)
ABSTRACT: A method is given for calculating two- and three-step
waveguide junctions with maximally-flat characteristics.
Tables are given for wav*e-impedance changes between
1.2 and 9.2. Acknowledgements are expressed to
R.Sh.Sharikova for her assistance with the calculation
work. There are 9 figures, 2 tables and 3 Soviet
references.
SUBMITTED: April 13, 1959
Card 1/1
V, tr. ~',A; Nl~ T:
-SV,
RMA10,12m,

0
S/11 211000101010061006
9" 1Z 3 D (A /S_6 /02 /, 1/3,2.) A055/AO33
AUTHOR: Yavich, L. R.
TITLE: Application of Chebyshev polynomials for the calculation of a
cascade connection of n identical quadripoles.
PERIODICAL: Elektroavyazl,no. 10, 19609 70 - 71
TEXT: The problem of determining the matrix [ajA of a cascade con-
nection of n identical quadripoles for a given matrix [a] of a single qua-
dripole, i *s solved by Doleial in his article published in,the Czechoslovak
periodical "Slaboproudy obzor'19 199 G", 4, 1958. Dole~al succeeded to obtain
a sufficiently simple solution for reversible quadripolSB (det[a] =Ial= 1),
solution based upon bhebyshev polynomials. In the present article, the
author shows, by a comprehensive mathematical reasoning, that the method of
Doleival can also be applied for the calculation of non-reversible quadri-
poles. Like Dolezual, he'examines the general case of a cascade connection
of n identical quadripoles, each of the quadripoles being described by a
matrix [XI (see Figure 1). By [X] can be understood either of the matrices
Card 1/4

21331
s11061601000101010061006
Application of Chebyshev ~polynomials .... A055/AO33
[a] , [A] and ETI
[A] being the mormalized matrix, and [T] the wave matrix of transmission.
Each of these matrices links the following magnitudest
~j ]_[a] ~2 11 aj 2
2 ra 21 a2 12
2 r
orff or A ~Unorllr
2 11 12 2
rInorm norm -
1 = [A] r rA norm
2 21 A2 21 12
orml , or T orm
e
ln 2n 11 12 n ]
ru ijn r21 2
normj M orm orm
Un ]m
10 20 12 T 2]
Card 2/4
rg,
J
g
-.4
-.i-t IIRMIM
Aw
But

S/1 0616olbooloiO16061006
Application of Chebyahev polynomials A055/AO33
(Abstractor's note: subscript "norm"is tho translation of the original
whereUi and I, are the quadripole input voltage and current, U2,and
Unorm norm Unorm, jnorm~
are the`quadriple'outpu~ voltage and current
2 1, 2 2 i
E
are the corresponding magnitudes (according to the normalization rules gl-
ven by the author in his article Ref. 4t Wave Matrices of a Quadripole,
Radiot6chnika, vol. II, No. 7, 1957), Unorn Unorm, and Unord Unorm
1n ' 10 2n 1 20 iar'
normalized incident and reflected waves of voltage at the quadripole;input
and output respectively. No Ximitations araimposed upon matrix X t which~ LIX
thus.represents any arbitray quadripole. In-the author's calculations$
W
ore
h Chebyshev polynomials are resorted top the'passage from non-reversible'
ones is based upon the use of the ideal power converter described by.E. V.
ZelyAkh in his article (Ref.. 3) Ideal Power Converter, Elektrosvyazi, No. I.'
1957. There are 4 figures and 4 referencen: 3 Soviet-bloc and 1 non-Soviet-
j -bloc. The English language publication roads as followat Tables of Choby-
ahev Polynomials, National Bureau of Standards, Applied Mathematics, Series;
Washington, December 1952,
SUBMITTED t October 28, 1959
Card 3/4.
3C

9.14oo 77-175
sov/io8-15-1-1/13
AUTHOR: Fp-lldshteyn,,A. L., Yavich, L. R.
TITLE: Engineering Computation of Chebyshev's Stepped
Transitions
PERIODICAL: Radiotekhnika, 1960, Vol 15, Nr 1, PP 3-15 (U3311)
ABST-1:?a'XT: The paper is an exposition of the method of
engineering computation of stepped transitions
between transmission lines. The results of
calculation'of 405 typical problems are given in
table form. The following two basic definitions
are given: (1) A stepped transition is a quadrupole
consisting of n sections of the transmission line
('stepB") which have the same length .9- and various
wave impedances P. (see Fig. 1).
A P
Card 1/16 Fig. 1.

Engineering Computation of Chebyshev's 77175
Stepped Transitions SOV/108-15-1-1/13
The purpose of a stepped transition Is to match
two lines with the wave impedances PO and r,
respectively. (2) A stepped transition is called
optimal, or Chebyshev, when (a) for a selected wave
impedance jump R = r Poj (b) a selected permissible
mismatching value Is /['/max' arid (c) fo:,- a selected
passband 'X2 - X.1 the transition has a minimum
overall length A 0 n-Q. The attenuation of a
Chebyshev transition equals 10 loglo of the mag-
nitude /Tll /2, which Is:
IT1112 = I + hS T42 /COs
t I M P, W,
where Tll(x) 13
Card 2/6 first type and
the Chebyshev polynomial of.the
n-th order, n 1i 2, 3... being the
P"
A,

Engineering Computation of Chebyshev's
Stepped Transitions
Card 3/6
77175
sov/io8-15-1-1/13
number of transition steps; h is a parameter de-
fining the permissible mismatch / F/max; P is
a parameter defining the width of the passband;
27FQ/A is electrical length of the step
-L
and A is the wavelength in the transmission line.
The stepped transitions are usually characterized
by 5 parameters: n, h, p, R and k 0, of which 3
may be selected Independently of each other whereas
the two others follow from computation. The re-
lationship between these parameters is derived
from Eq. (1) by considering cos G)= 1, i.e., for
zero length of the steps, and taking values of
the argument x = cos (D/p at the boundaries of the
passband. The following expressions have been
obtained:
P= (12)
Cos arc Cos C
n

Engineering Computation of Chebyshev's
Stepped Transitions
Card 4/6
77175
SOV/108-15-1-1/13
A, 2-.1 (15)
it - arc cas p
2n1
arc Cos P
where A 1 and A 2 are the wavelengths in the trans-
mission line, generally different from X 1 and X 2
in the outside space. Tile length -9-0 = n _Q_ is given
as:
3 2r (18)
rc.cos [c03 17, 'Irc c' C
C in Eq. (18) and (12) is defined as:

Engineering Computation of Chebyshev's
Stepped Transitions
C~d R-1
21jVk- *
77175
SOV/108-15-1-1/13
Expressions are given for the wave impedances Pi
Card 5/6
of -the steps of transitions with n = 2, n = 3, and
n = 4. Values of R, p, and p. are given in tables
for n = 2, n = 3, and n = 4, and for various
magnitudes of / r,/ max' The tables give the sol-
ution of 405 typical synthesis problems of stepped
transitions. Two numerical examples illustrate
the use of '-he tables for rapid computation of similar
problems. In an appendix to the paper, expressions
for P 1 and P 2 in a two-step transition are de-
,rived by comparing the coefficients of cos a in Eq.
(1) and in an attenuation equation obtained as a prod-
uct of matrices of stopped transition elements. R.
Sh. Shakirova helped make the calculations.

Engineering Computation of Chebyshev's 77175
Stepped Transitions sov/lo8-l5-l-l/-'j3
There are 5 figures; 3 tables; and 7 Soviet references.
SUBMITTED: October 14, 1958
Card 66/6
q
ati-mv,
zaa
3 iJ5,

J
YAVIGH, L. R.
Rp-marks on tb- -alcualtion of an n-number cf series-connected
four-terminal networks. Radiotekh-i elektron.6 no.5.-824-826
My 761. (MIRA 14,
(Electric networks)
IT'

S11061621000100410101010-
A055/A1O1
AUTHORt Yavich, L.R.
TITLE: On the computation of the elements of the resultant matrix of a
cascade connection of four-pole networks
PERIODICAL: Elektrosvyaz'p no. 4, 1962,4~7*0 - 71
TOM This article deals with a method permitting the determination of -the
elements of the matrix of the regultant four-pole network directly from the ele-
ments of the matrices of the component four-pole networks, without calculating the
intermediate matrices. This method was described by Dreikorn and Stockinger (Ra-
tionelle Berechnung mehrfacher Matrizenprodukte, Arch. elektr. Obertrag, 1959, 13
no. 7). The object of the present article is merely to illustrate this method on
a practical example. The author applies the method to the case of a transistor-
ized two-stage amplifier. He replaces the transistors by T-shaped equivalent
circuits and by ideal power converters (according.to the method of E.V. Zelyakh,
Elektrosvyazl, no. 1, 1957). He obtafr~s thus the overall equivalent circuit of
the amplifier (Fig- 3), representin~5 the amplifier as a cascade connection of
several four-pole networks. The aj matrix of the amplifier is:
Card 1/2
4
-Qk
,IRL
P
M -

S/106/62/000/004/010/010
On the computation of the elements of .... A055/A101
[a] a][ 12 ' a][ (3) a]
K
Where K is the resultant ideal power conversion coefficient. The author computes
the elements of this matrix with the aid of the Dreikorn-Stockinger matrix chart,
which is,reproduced in the article. There are 3 figures, 1 table and 3 rofer-
ences: 2 Soviet-bloc and 1 non-Soviet-bloc.
SUBM=D: January 23, 1961
Figure 3: L
L -.-j L-.---j L..-- --i
Card 2/2
3

AUTHOR:
TITLE3
PERIODICAL:
3404
6/109/62/007/001/012/027
D266/1)301
Tp-~i ht-~~
Synthesis of stepped transmission line transformers
with a maximally flat frequency characteristic
Radiotekhnika i elektronikap v. 7# no. 1, 1962t
105 - 112
TEXT: The paper is concerned with the design of maximally flat
step-transformers for specified bandwidth and reflection coeffi-
cient. The design method can be applied to any number of steps. The
characteristic impedances of the two transmission lines to be con-
nected are - and r respectively and their ratio is represented by
Po
R. The transformer consists of n elements of characteristic impe-
danceg Pi and length, A, where A is the wavelength at t
-1 = Ao 0 he
middle of the band (not necessarily equal to the free space wave-
length ;Lo). The transmission coefficient of the whole system is
written in the following form:
C-C a-r d_l_/'4~)
'77

30341
S/109/62/007/001/012/027
Synthesis of stepped transmission ... D266/D301
T :2 1 + 4R 0082no (1)
11/2
/
where 0 = 2xl/A - electrical length. The absolute value of the re-
flection coefficient can be expressed with /T11/2 a, follows:
(2)
C-11 _T
11/2
If the maximum permissible value of the reflection coefficient, Pr
and the edges of tho band Al A 2 are specifiedp the required num-
ber of elements can be determined, It is an interesting property of
the maximally flat transformer (in contrast to the Chebyshev trans-
former) that the ratio of characteristic impedance is independent
of T"r. In order to apply the method which A.L. Felldshteyn (Ref. 2:
Radiotekhnika, 19609 15, 11, 11) used for the Chebyshev transformer
the author rewrites (1) in zie form
/TJJ/2 1 + H2(cos 6)2n 1 + H2r2 2n
S
Card 2/4
HIMP"E
4~_l Mto
'N
_14
I j
i~ k~_ TUX NK, SR

34034
S/109/62/007/001/012,'C27
Synthesis of stepped transmission ... D266/D301
where Sn = 2H H = / [-/r (8)
R - 11 11-12
r
and varies between +1 and -1a The characteristic impedances can
then be determined with Felldshteyn's methodo If the approximation
1 1 + /[-/2 (17)
/f-/2
is used the resulting equations are much simplified and the reflec-
tion coefficients at each step are obtained in the form of binomial
coefficients [Absttactor's note*- The author is apparently unaware
of the fact that this problem was solved by W.W. Hansen a long time
ago (Notes on Lectures, oh. 6, MIT -Rad. Lab. 1941-1944)]. The eitAct
and approximwte values of p po are compared for a six element
P6 = "61
transformer for R = 1.2 - 9o It is shown that the maximum error com-
mitted is about a half percent. In Appendix I an example is worked
out whilst in Appendix II the ratio of the characteristic impedan-
ces Pi = Pi/ro are tabulated for R 1*2 10 and n = 49 59 6.
Card 3/4
X~ P11
'G_
M4
mom,

34034
5/109/62/007/001/012/027
Synthesis of stepped transmission D266/D301
There are 1 figurep 2 tables and 4 references: 3 Soviet-bloc and 1
,non-Soviet-bloc. The reference to the English-language publication
reads as follows: H.J. Ribletp Transp IRE, 19579 MTT-59 36,
SUBMITTED: January 9. 1961
Card 4/4

XOICHI'L R
R-oblem concernir4g, the calculation of the resulting matrix of series
connected four-terminal networks. ElektrosviazI 16 no.4z7O-7:L
Ap 162. (KERA 15 4)
(Electric networks) (Transistor circuits)
M

35377
S/108/62/017/003/003/009
D299/D301
AUTHOR: YavichL L.R._L Member of the Society (see Association)
TITLE: Input resistance of stepwise junctions
PERIODICAL: Radiote khnikag v. 17, no. 3,1962, 22 - 25
TEXT: The input resistance of stepwise junctions is determined.
The advantages are ascertained of junctions with maximally-flat
frequency characteriBtiCS,, as-compared to Chebyshev-type junctionso
if constant resistance-values and small reactance-values are requi-
red..A stepwise junction is considered between 2 homogeneous trans-
mission lines with resistances ~o and r, The junction consists of
n similar sections of length 1. It is required to find the input VV
impedance zin' corresponding to different laws of change of the
attenuation function L of the junctions; thereupon it is ascertai-
ned which type of junction is more advantageous. The problem redu-
ces to calculating the complex element of the wave transmission ma-
trix T11 for the 2 types of junction under consideration: Chebyshev
Card 1/3
V,
K -4 nt
ii,
41
N MR!-
if N
"-N!, C,~~ Rzw ~-_i
K

S/108/62/017/003/003/009
'Input resistance of stepwise junctions D299/D301
and maximally-flat. For the first type, the function L is expressed
by
L = /T 11/2 1 + h 2T2(cos 9) = 1 + h2 T2(n)p (6)
n S n
and for the second, L is expressed by
L = /T 11/2 = 1 + H 2(c08 E))2n = 1 + H 20 2n (7)
S
where h and H are proportionality factors, S - a scaling factor, 8-
the electrical length of a step, and A - the wavelength. After com-
putationsp one obtains:
T11 (P) = K (P - P I)(P - P2) ... (P - Pn)9(9)
V(p2 7)3~
where K is the coefficient of the leading term of the polynomial
T110 Formula (9) in conjunction with the,expressions for the real
and imaginary parts Of Z in (Z in Zin/po), yield the solution to
the problem. The resistance- and reactance components of the impe-
Card 2/3

B/108/62/017/003/003/009
resistance of stepwise junctions D299/D301
dance are compared in 2 figures. The characteristics of the input
impedance of Chebyshev junctions become more irregular with increa-
sing number of steps. Conclusions: In stepwise junctions in which
almost-constant resistance-values and very small reactances are re-
quired, it is advantageous to use junctions with maximally-flat
frequency characteristic and number of steps n = 5, 6. Analogous
requirements can be met by means of 0hebyshev stepwise junctions
with very close tolerances on mismatching. This however, cancels
the advantages (wide bandpass) of the Chebyshev junctions. There
are 5 figures and 3 Soviet-bloc reference.
ASSOCIATION: Nauchno-tekhnicheskoye obshchestvo radiotekhniki i
elektrosvyazi im4.A.S. Popova (Scientific and Techni-
cal Society of Radio Engineering and Electrical Commu-
nications imeni A.S. Popov) [Abstractor's note: Name
of Association taken from first page of journal]
SUBMITTED: January 11, 1961 (initially)
July 8, 1961 (after revision)
.Card 3/3

EMI, Aleksandr L,vovich- YAVICHI Lev Rafaelov:icb; SMUTIOV)
FEEL I DSHT fDY=V- N-A-,
VitaliY Petrovich;
tekhn. red.
element,, of waveguide technoloa] Spravochnik
[14anual on the qoppnargoizdnt?
01month
VI (min I.,11
1963. 359 P-
-VF -4 ~I~o IMAO,~~
HIM kWE 'k,
lrrgj~ S-, U'A" ~V'M
p
S~ 1'
4M.
A 4~:

3 BDS
KR; AP30OU24 5/0108/63/018/006/0015/0025
AUTHOR: Mazepova, 0. 1.,, Falldshteyn. A. L.; Ya Ich L..R. Members of the Society
(Se.e AssociAtiou)
TITLE: 'En neering-calculation.of SHF band-pass filters
SOURCE.-, Radiotekhnikar Va 18# no-~/11963, 15-25
TOPIC TAGSs SHF band-pass.filter
-ABSTRACT: -The -method of- _SHF-_fJ1ter-__ calculation- is based. on- an. equivalent- replacing-.
of Ithe lumped-parameter systems (low--pass filters and ladder-type band-pass filters)
with the filters formed by inhomogeneities in waveguides. The article offers: (1)
a systematic procedure for calculating SHP filters with quarter-waTe couplings;
(2) tabulated typical calzulations. Functions of effective attentuation for both
the Tchebycheff and the maximum-flat-frequency response filters are evaluated.
Cavity resonators are represented by waveguide stubs terminated with three induc-
tive posts on each end. The design tables were compiled by means of an electronic
computer. "Programing Tqas performed by' Engineer A. V. Ivakina." Orig. art. has:
9 formulas. -11 figures, and 7 tables.
Card 1/2
------------

iv~

YAVICHI L.R.
Local reflection coefficients of junctions with an arbitrary
n=ber of steps. Radiotekh, i elektron. 9 no.4:750-752 A 164
(MIRA 17,
.75

ACCESSION NR: AP4038599 S/0108/64/019/005/0026/0029
AUTHOR: Yavich, L.','R. (Active member)
TITLE: Design of Cheby*shev directional couplere with an arbitrary number of
i sections
SOURCE: Radiotekhnika', V. 19 .' no. S, 1964, 26-29
TOPIC TAGS: waveguide, waveguide coupler, directional coupler, directional
coupler design, Cheby*shev directional coupler, transmission line
ABSTRACT., A caocade connection of n reversible 8-pole networks is
considered. Cheby*shev functions are developed'into Fourier Beries. The trans -
mission factor for an even n 2N number, of sections is given byle,
h (-I)N-q (21V 1) (N + q - 2)1
Pat _L
tn)1(q-1+-)1(M-q)1 kS)
2
q-m
I Lard I /Z

,vovich; YAVIGH) 1_,Sv Itafitelovich. Pri-
Fb_L'DSHT',-,v,N Aleksandr LpROKHOROVA, 14 Y'"OBSO!-I,--- .. -Kh
nimala :chastiye
(Synthesis of four-terminal and eight-terminal micro-
wave networks] Sintez chetyrekhpoliusnikov i vos,mipo-
liusnikov na. SVCh. MoAva, Izd-vo "Sviaz' 1965. 352 p.
IMIRA 18:5)
M
j
-Mir
0, 51.
W "M V

XIRILU)V~ L.G.; YAVICIlt L.R.
Wculation Cf S'u3ppi.'Ig JXICMopis and directional rcuplP~ra wi?Ah
a randam wimber of elements, Padlotekh. elektron. 10 no.6,
18.- 6' ) Id
1153-1155 je 169
5S

L 2609-66 oos/.1536 1539
01169/65/010/
.ACCESSION 11R: Ap5o20133 621-306.671-2
AUTHOR: Lav_hj
ing smooth Chebyshev transition e
TTrLw,: synthasiz
ektronika, v. io, no. 1965, 1536-1539
RM, Radioteklmlka 3. e1
o
S
waveguide matching
_7eguides
!TOPIC TAGS' va
T. Taylor for synthO'31zing
method developed by T
JABSTaAGT. A mathematical (MB Trans -I 1955s AP-30,16) i-S eadapted for synthes1z
Icontinuou-S~-r'!Alator antennas naleulont (matchino 3 ction). These for
Ing- the Cheloyshav-tYPO ta~,pered trans-it'10 developed:
0 relative ebaractarlstic impedanc -eare
~or th
2n
sin
.'expf bin _L '
F (0)
where p i
d
U
-----------

L 26415-66 EWA(h)/E',YT(1)
~-ACC NRs. AM5018510" Monograph
Felldshteyn, Aleksandr Llvovich~
.,YAvich, Lev Rafaelovich
frequericy f6ur-terminal,and eight-terminal networks
ch6tyrekhpolyusnikov i voslmipolyusnikov na GVCh) Moscov, Izd-vo "Svyaz" 1965.
352 P. 'illus., biblio. 5TOO copies printed.
TOPIC TAGS: communication network, array synthesis, superhigh frequency,-SHF comfMI
cation, transmission line, waveguide coupler
.PURPOSE AND COVERAGE: This book is intended-~.as a manual for scientists, technicians,
and college students concerned with the theory and operation of transmission lines
Theoretical and design problems concerning filtersi matching devices, directional
couplers, and other similar devices. The authors thank 0.-1. Magepaya, !Le. _V.
Soloviyeva. A. V.Ivakina._V. P. Smirnovi-R. Sh. ShakirM, and N. .1.,.ProMWXQ=_
for their assistance.-
TABLE OF CONTENTS [abridged):
..Foreword 3
Ch. I#' Some information ~.on the classical theory-of foUr terminal networks
Ch. H. External wave parameters of four-terminal-networks 31
Card UDC: 621-~,37;~.jA:62i-.~..029,.~~001.24-
b
-p, OUR t~i - - 0",
A,
WWR
-Q

L 26415-66
NR, AM5018516

YAVICH, M.P. (Moskva)
Nffect of hypothermia on the restoration of the nucleic acid
balance in various organs and tissues. 3kopokhir. 4 no.2:
55-56 Mr-Ap '59. (14M 12:5)
(HYPOTHUMIA, eff.
on nucleic acid regen. (Rua))
(NUCLEIC ACIDS, metab.
eff. of hypothermia on regen. (Run))

YAVICH.L M.P.
Changes in the intensity of protein synthesis in the injured mycardium
of rate. Dokl. AN SSSR 134 no,6;1478-1480 0 160, (14IRA 13:10)
1. inatitut morfologii zhivotnykh im. A.N.Severtsova Akademli nauk
SSSR. Fredstavleno akademikom A.H.Bakulevym.
(PROTEIN METABOLISM) (HWT-WOUNDS AND INJURIES)
--Z
B
JV"

YAVICII, M.P.
Change in autol,7tic processes in lesion of the myocardium. Bmp.
khir,,i anest. 6 no 3,08-59 261. (MIRA 14: .10)
ZHEART.-DISEASES)

POLEZHAYEV, L.V.,- AKHABADZE, L.V.; ZAKHAROVA, N.A.; YAVICH, M.P.
- -----------
Effect of pyrogenal and myocardial hydrolyzate on the regeneration of
the heart muscle. Dokl.AN SSSR 138 no.3:714-717 My 161.
1, IrstitUt morfologii zhivotnykh ime A.N.Severtsova AN SSSR,
Predstavleno'akademikom A.N.Bakulevym.
(Heart-Muscle) (Regeneration (Biology))
(Pharmacology' '7(Tissue extracts)
N-g Wf-Rif'. 11,3g
J;
vi
M
N
"Ll ,-.11, 2,

YAVICH, M.P.
Change of SH groups in tissueb-d the injured'myocardiud of A
rat. Dokl. AN SSSR 339 no.6:3411-1473 Ag 161.
--(MIRA
morfologii zhivotnyW,im. '66eritsova AN SSS
1. Institut A.N' R.
Predstavleno akademikom A.N. Bakmlsyym.
(MMAPTO GROUP~ -
(HEART-"WOUNIS AND INJMUY.S)
N.,
R -H.
MOWN, 1",

POIEZHAYEV, L.V.; AKHABAD2E. L.V.; MZLAYEVA, N.A.; YAVICH, M.Pi-.---.-
Regeneration of a rat's myocerdium as an'effect of
',iibonucleic acid and pyrogenal.-,treatment. Dokl.AN SSSR
.345 no,5:1180-1183 (MIRA 15:8)
I. Inititut morfoloRii zhivotnykh im. A.N.Severtsova AN SSSR.
ART-KJSCLE)
(PROGENk (NUOM (
(REGENERATION (Bidb*))
m m
; -, , Z
A' FE :!04
M
g
uiffi"
m ~~v~~,~Zgnqg ror
E

,YAVIGH-l M.P.
. .........
Variation in nucleic acid content during t~e bealing of an
injured myocardium. Dokl. AN SSSR 147 no.1:248-251 N 162.
(MIRA 15:11)
1, Institut morfologii zhivotnykh im. A.N. Oevertsova
AN SSSR. Predotavleno akademikom A.N. Bakulevym.
(Nucleia acids). (Heart-44usele)
(Regeneration (Biology))
F.
Uk~
P
"N' V7

POLEZHAYEV, L.V. (Moskva V-333, 2-y Akademicheokiy pr., d.4. kv-4);
AKHABADZEJ, L.V.; MUZIAYEVA , N.A.; YAVICH, M.P.
Stimulation of the regeneratioh'of the myociirdium In inhibited
cicatrization. Grud. khir. 5 no. 2:47-54 Mr-Ap 163. (MIRA 17:2)
I Iz laboratorii eksperimentaltnoy morf6logii'zhiv-otnykh'(zav.-
;roof. L.V.Polezhayev) Institute morfologii zhivotnykh imeni A-N
Severtsova (direktor chlen-korrespondent AN SSSR G.K.Khrushch;v).
V

TAVICRI, M.P.
Effect of vitamin B12 and pyrogenal on the intensity of prot4n
synthesis in a damaged heart muscle. Dokl. AN SSSR 150 no.1:217-220
Yv 163. (MIRA 16:6)
1. In5titut, morfologii zhivotnyth im. A.N.Severtsoia AN SSSR.
PrjOstavleno akademikom A.N.Bak4qvym.
(CYANOCOBALAMINE) (PROTEIN METABOLISM) (HEART-MUSCLE) (PYROGENAL)

POLEZHAYEVv L.V.; AKHABADZEI L.V.; MUZLAYEVAI N.A.1 YAVICH,, M.P.
Stimulation of myocardium regeneration in rabbAts and dofe,
Dokl. AN SSSR 15.1, no.6:1450-1453 D 163. (14IRA 17:1
1. Institut, morfologii zhivotnykh im. A.N. Severtsova AN
SSSR. Predstavleno akademikom A.N. Bakulevym.

POLEZRAYEV, Lev prcf.,~ O"ABADZE, Lyubovl Viktorovm;
iVOCH,
Marina
MIJZLAYEVA, 11ina Andreye%rnaj
KOSOBUTSKIVjV4V.T
(Stimulation of the regeneration cX -the heart ruscle] Sti-
muliatsila regeneratsil myshtsy serdtsa. Moskva. Nauka,
1965. 395 P. (MIRA 18:11)
1. Akademiya na-uk SSSR, lnsti-',~ut morf olngli zhivotrrykh.

YEGOROV, I.F., inzb.; YAVI_ inah.
Now type of fastening for pin couplings. Sudostroenie 24
nn.7:69-70 JI 158. (KIRA 11:9)
(Fastenings)

ZAYTCEVI, V.F., inzh.; YAVICH, S.M., inzh.
Electrochemical deoxydation of feedwater. Prom. energ. 17 no.12%
18-21 D 162* -4)
r t4 'W
pt~

AUTHOR: Yavich,, Zo,, Kaster of Sports, Villnyus (Vilnius)
TITIS: First (Aviation-Sports Club Comipetitions)"in the Republic (Vperyyye
v respublike)
PERIODICAL: K1711ya rodiny, 1958, Nr,.3.1,, p 3.9 (USSR)
ABSTRACT: The author states that th* opening of the first aviation-sports
club In Villnyus contributed greatW to the develolment and interest in
Parachute sports in the Lithuanian Repub3ic.
ASSOCIATION: Aviatsionno-sportivayy klub (Avistion-Sporte Club)
Card 1/1
r'5*_UwMW out--, 011%~IrA-M!UWI_C~A !M
g.;2
f:
V
x

SILAKOVA, A.I.; TRUSH, G.P.; 4YILMOVA, A.
Micromethod for We determination of ammonia and glutamine
In triobloroacetic tiavue extracts. Vop. mod. khim. 8 no-51
538-5" S-0162 (MIRA 1784)
1. Inatitut biokhimii Akademii nauk Ukrainskoy SSR,, Kiyev.
41 ~l
t

in t~ f-r7z. or,
r 41je
Ir
uf aamonla in Lhe Muscles- VOP- med. R. 10 no.l:40-.0
'64- (M-D-h -17: 12)
1. Institute of Biochemistry, Academy of Sc-lenQes of th,~! likra.;-
nian S.-S.R.,
'j4;

BUDNIKOVY P.P.; VOLAROVICII, M.P.; POLINKOVSKAYA, A.I.; jUjZjr-IU,
Study of the character of the expansion of some types of
volcanic, hydrated glass by means of.motion-picture-filming.
Stroi.mat. 9 no.301-33 Mr 163. (MLRA 16:4)
(Perlite (Mineral)) (Motion-picture photography)
t

VOLAROVICH, M.P.; POLINKOVSK,AYA, A.I.; YAVITSp I.N.
Blistering of water-containing vulcanic glasses (perlites) studied
-by motion-picture photography, Koll.zhur. 25 no.5:512-514 S-0
~163. (MIRA 16:10)
1. Respublikanskiy nauchno-issledovateliskiy institut novykh
stroitellnykh materialov, Moskva.
%
,j I zi~'_s"-:'~~-ftj3nj. !i~i '1~1
kA
5-1
W, S4.

I.N., inzh.
Investigation of the viscosity and fusibility of some vol-
(gmic glass containing water. Sbor. trud. ROSMINS no.25z
54-62 t62 (MIRA 17z8)

TASEDY
I.N,,, inzb. j It M, V.V., inzh,
Effect of some properties of acid, volmmiap vater-con-
taining glass on the quality of expanded perlite. Sbor.
trud. ROSNIIM no.25t94-104 162 (141RA 170)
j
M, 41

BUGOV,* A.U., inat...; rAnTs. init.
Study of the atrannod statim of holmingm and flange
connections of ban IoWw. [Trudy) LMZ no.loil9l.198 464,
OCRA 18: 1.2)
MR

KOVALENKO, V.A., inzh.; WITS S.N., inzh,
Results of the field tests of moments acting on the blades of the
gate apparatus of a reversible-blade hydraulic turbine. Energomashino-
stroonle 10 no.8;12-14 Ag t64, (MIRA 17i11)

W NMI
1. YAVITS, Z. B.
2. USSR (600)
4. Moscow - Floriculture
7. More attention to floriculture. Gor khoz Mook No 11 1947
9. Monthly List of Russian Accessions, Library of Congress) April -1953, Uncl.

YENIKEYEV, P.N.1 KOZLOV,, P.T.t YA_YlqN.,,_P.Ye.
Oil and gas resources of Central Asis and proBpects for their
development. Geol.nefti i gaza 9 no.2:1-5 F 165.
(MIRA 18:4)
1. Gosudarstvennyy geologicheskiy komitet SSSR,, Vessoyuznyy
zaochny-y politekhnicheskiy institut i Vsesoyuznyy nauchno-
issiedovateliskiy geologorazvedochnyy neftyanoy institut.

CT!"TRI : us.'Yl
: Soil Sclonce. orgfink FortilJzora,
A~?S. JOUR. : PZh.Bi.ol
iwoh
3 1959
,
A I I T P'OR Furbatov, S.,
Kirgiz Scientific Research Inst.4tute of Agricultu'vo
llertiliziLg Ef feet of Waste ',later, and Sewt-,ge in Chayakeya
Valley.
0 7`~ T G. PUB. Tr. Kirg. ii.-io in-ta zfimledoliya, 15f)7, vYP- .1, 1.52-157
A P~ 3 T? ;I augar refir-eriet in CLuyskama, Valley, KirCI-4 S~P,
severEii hund-rea thoueaand tons of filter prose f.---vsqrj Pc-
contalfling 10-15~" of orgallic mattor, t~p i0
of of Ca and differf~nt trace a!-
., 0.5% Of N v k.0
om-antz~ Thaaj~ refineries dump 4-.5 million cubic niiters
of wanta wqtar annually, enriched with Ca and 'L-~g Und C(jII-:
tairiing 25-58 kilograms of 11 in 1000 cubic mit'ars , -].ad
almo X.20 and P, 0 Thia water, as well an the f I ter
Prang Bewage are an oxcelleat fertilizer fol, corin &,Id
L-T 2

in M
-77
qv~
S"
E

UUUNTRY
CATEGORY
ABS. McR. 1 RZhBJj.O1.P I-TO. 1959, INO. 10704
07HOR
TITLE
ORIG. PUB.
A P S"T M4 C T other a,~rictiltural crops on woll drained siorozoia fok)t-
hill plaius. in the experionce on filtration ficlar, on
weakly solonized siorozems uhich received for thf~ rxecod-~
ing 2t-., yearn from 6U-80 to 90-120 cubic moteru at wznte
water, the agrophysical tnd ogrochomicnI propert.'eii oftho
Poil Amprovea, oapecially with the combined application
of wast6 water and sewage. The y1eld of cora graiL, on
the fertilized plots comprized 35-41 ceatners/ha againot
21 contn!tri5/ha on the control plots. Waste water uriq I
filter pres4 nowvge incrorise uharply the yiolds of &~in-
flower, cucv~rbits, sorgh=, onions, ena beets. h. N.
'/2 Sokolov
..A RD
-A~
AP~

YAVLANOV., I.G.,, felldsbor (solo nabotskaye., Ka-lininskaqa oblast)
Conscientious aspects of the work In a medical and obstetrical
station. Felld. i akusb. 28 no-3:50-51 W63- (KIRA 16:7)
(MEDICINE, RURAL)

SIVOKONEIIKO, I.M.; YAVLENSKIT, K.N.; YABLOITSKAYA, L.V.
Using small-size ball bearings in the manufacture of aeronautical
instruments. Trudy LIAP no.11:62-68 156. (MIRA 11:2)
(Ball bearings)
(Aeronautical instruments)
A.JKA_R~

SOV/124-58-1-176
Translation from: Referativnyy zhurnal, Mekhanika, 1958, Nr 1, p 19 (USSR)
AUTHORS: Sivokonenko, I M. Yav K N
TITLE: The Rpm Dependence of the Friction Moment in Instrument Ball
Bearings (Zavisimost' momenta freniya v pribornykh shariko-
podshipnikakh ot chisla oborotov)
PERIODICAL: Tr. Leningr. in-ta aviats. priborostr. , 1956, Nr 11, pp 69-80
ABSTRACT: A presentation of the results of theoretical and experimental
research on the friction moment of ball bearings operating at high
rpm (e. g. , in gyroscopes and high-speed motors). The investiga-
tions were performed up to 25,000 rpm. The authors are of the
opinion that, above 4,000-6,000 rpm, centrifugal forces exert a
noticeable influence on the magnitude of the friction moment.v
V. M. Alyamovskiy
Card 1/1

VINETS, Ya.M.; SIVOKONENKO., 1,M.; $11MMOVICII., I.S.; YAVLENSKIY, K.K.
Effect of magnetic fields on the antitorque moment in instruzent,
ball bearings. Avaprom, 26 no.8:27-29 Ag 157. (IMA 15:4)
(Ball bearings-Teating)
-.5 r0":i;,--A 1"," Pe
v

S0V/123r5qrl5-,6Ol4l
Translation from; Referativnyy zhurnal. Manhinostroyenlye, 1959, Nr 15, p 177 WSSR)
AUTHORS: Sivokonenko,:I.M., Yavlenskiy. K.N.
TITLE.- Variations of the Friction Moment in Instrument Bearings Depending on
the Magnitude of Atmospheric Pressure
PERIODICAL: Tr. Leningr. in-t aviats. prlborostr., 1958, Nr 19, PP 155 - 158
ABSTRACT: Results are given on the investigations of variations of the moment of
friction in lubricated and non-lubricated center bearings and ball bearings
with an outer diameter of 10 mmX in dependence on variations of the rare-
faction of the surrounding medium. The-investigated steel centers or
inner bearing races were connected with an electromotor, and the ugate
thrust bearings and outer bearing races with a dynamometric device con-
sisting of a speculum, electromagnetic damper and hair-spring. The
twisting of the latter, under the effect of the moment of friction, was
recorded on photographic paper by the deviation of the light ray reflected
Card 1/2 from the speculum. The drive and dynamometric device were put under a hood

BOV/123-59-15-60141
Variations-of the Friction Moment in Instrument Bearings Depending on the Magnitude
of Atmospheric Pressure
from which the air was pumped out. The investigation showed that, at a decrease of
-atmospheric pressure down to 2 _ 10-2. the moment of friotion-increases: for center
bearings without lubrication by.11%, with lubrication by 15%, and for ball bearings
without lubrication by 20%, and with lubrication by 38%. 3 figures, 4 references.
K.S.M
Card 2/2

GORDIYENKO, Prokopiy Lukich; SIVOKONENKO, Igor' Mikhaylovio; FADEYEVI
Aleksey Antonovich; YAVLENSKIY, Konstantin Mikolayivich-
DEMENTIYEV, Khrisanf Ni_kfro_ro_v1_cK,_-LY1rST1BERG, V.F., d.;
PONOMA,RRV, V.A., tekhn.red.
(Laboratory equipment for measuring friction forle moments in
the supports of apparatuses. Device-for testing the i*Ct'
hardness of ice infield conditions-)Laboratornaia ustanoiw dlia
izmereniia mokentov ail treniia v oporakly priborov. Ustroistyo
dlia ispytaniia udarnoi tvardosti l1da v polevykh usloviiakh.
Moskva Filial Vaes.in-ta nauchnA tekhn. informatsii, 1958.
11 p. IPeredovoi nauchno-tokhnicheskii i proizvodstyennyi opyt.
Tema 32. No.P-58-33/6) (MIRA 160)
(Engineering Instruments--Testing)

SIVOKONEffir.0
I.M.; YAVLENSF
investigating ball "hearings used in-gyroscopic devices. Vop.
prikl. gir. no.2sl6-24 f60. (KRA 15W
(Ball bearings) (Gyroscopic instruments)
MORA
R Q
=77

Al ir/