gra4'1ate of ta - vtechworks.lib.vt.edu · a 1!181' or di llllic!lob .. balllalllob or a...
TRANSCRIPT
![Page 1: Gra4'1ate of ta - vtechworks.lib.vt.edu · A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI 'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of](https://reader035.vdocuments.site/reader035/viewer/2022070616/5d4cfe3f88c993aa6c8b71c6/html5/thumbnails/1.jpg)
A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI
'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of the
Vlraf.ata hlytecbaie lutitute
ta cu11Mliac1 for the clep:ee of
ta
.Aupat 31. 1965
Black1bw1, •tr1tala
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ftotopa,U of en. lxperi.menta1 Appeata1••••••••• U CaU.larat:l.a of bea._.. fs.k•Vp B1-ta • • • • • • • • • • aa ft9tapepl\a •I ._ Watet:-lawt." .__lllll IU.8to1')' •• tlle ,.1 ... ······························ as
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i•a ad tJr.tbUM:td.•~ton pr;11d:®ed hy a -~·bia .... r ~eaen• wa1111 eMowtter•
• brli•b :tn a pip~t~. lt ._._ d11itd.:rt14 to •t.ttn • "~f1Mt1on &'t:d
~ ~ei iOi:' tMI ~ :c>i 1»tmy ha4
4Ulya1e of ~s••• ~·• ttta.mttd
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.AnetlMH.," ufl, tmteh ~a ~b w.14$2' scope, WtU 1a
~~ ~" k1- tteU(ictn ~ t:raumtt~« clU~f;)~~ac•~t a mmttctpl
w.te1:1""'iJUffl1 .,..,~ ••
fii"l~ 11 tM t.he«ette.al ta1atl~ldp$ W:te d.atumt~
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tlae .__. paelal Uff..-tal ..... ,. u wived feta a.t•'• ..... l• .............. to ................ of ., •l• ......... ,_,
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wtr\~e ou<tw1ttt:an a br~11;iit'!tn
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A= AREA a =WAVE VELOCITY
FIG. Clo>-- DIAGRAM OF REFLECTED ANO TRANSMITTED WAVES FROM A TEE
GRADE LINE Fa Lo _j
H2o •Hao H10
2&3 ' VALVE
FIG. Clbl-CONOlTIONS BEFORE fi WAVE ENCOUNTERS A TEE
LLT ~-----..... ----....--... F2=F3
-...11111!_..."'r---~---1---1----_ .J _ - --- _Ff, --. L----~---- -
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263 '
FIG. Uc>--CONOlTtONS AFTER F, WAVE ENCOUNTERS A TEE
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.sip '.I.Wit be used with the &qu6'.l'a l'O#t 1~ lq .. (20), fr•~· (U) aad
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of the nflectu ~ tl'~tte.d vave11 f:'m a t•· ~ cmly r~r~t
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41 '10 .. pl • 100 !t. I
It ta r$U*.lll7 «ppsret that ter• will bf! no eaku1abt. ~eflecUcm
fo~ thil ,.-t.uular ~!I• AlbO, it should~~ noted that the pa:l'-.c.-
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GATE VALVE
SOLENOID VALVE
112 H TUBING
TRANSDUCER C OlLING
ID~TRANSDUCER
COIL\NG
6" PIPE
RG. C 2)-- SC HE MAT IC DIAGRAM OF EXPERJMENTAL APPARATUS
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Fi • (3) Phot·ograph of the Experi e t l Apparatus
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1e:1•n -. •tva-1 ~~ta vet'e' 1•f~4. ff:tt~ ~n ..... ti.on •f te •t~•·~q ~ .. Nl.1~1:atu ... a ·~~~-
la&~ tutetr. !be ~•uluc.,. _. "11~ t$ w.. up ic dd.r't)' ~~ru11;t~•
aa tJ: .... ~ ... ~-a ~~t•• co t- t<1•~ .u ••d wtgbu W!!!!n
_,lied U $~ f£1. (J) • hM~al dtfflltt:el\t ._ • .,,1W
U • lf.~tty t:~ ~led ~ft·M~~" U. Wlf;~
r~d., •«at4.alnU7,. &. U psi t• """' ·fhe 1rol4u o~ dd.• •·•U.~ra•
u. ~· -~ .fig. (4).
1:11 p•:rf~ «M act-1 ~~. ~#au!.~ ea ~•
~ 1a• vatw -.. WJ.1 ~--· ~ ••" we all~ n", •'ill h!gh wl•it;J1 a .adftcM:at •I ~ euu:re ~t 611
l~M ah WS !"~ tM pipU.... ~- ~j,~ WU
eb~4 1'1 ~ ~ en-er l'e,gtdati• gate val,,.,
·~ of ~ .. '1fllMt.M to p:l'OVW. t~ (le~dl"d lltliil~
~¥41• ti. ~··• ·~ am •• b.t•uttr wu -~_. cafte.:po-1 to tl» $~ ~. pt:det«<nd.~M the
&a. ~•lt7 .. tr1tl Wllf! •tia1•4 a uid. ad. ~tt• F••.t~.
ta ~t• _.,.. 1~• .,..DI •• at 1'•11 -
t1m.-. me~• ·-- -~ t>?) t• »UM~ fOl1tte. It~ ~ c~ bati
k ~· .a a 1nttu -~ was *" •i~e oat~~
-. euU1 the n~.,H~~~t l!ahttrt1 io.rat~,.
a tMl'tJ ·~ waU:i• ~ri."'4 vu •e•~ a pb.o~aph
tieuld ta~. ~ t• .i.1~ -~"'1'1:7 ""'"" • dtw.l•~~11~
![Page 23: Gra4'1ate of ta - vtechworks.lib.vt.edu · A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI 'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of](https://reader035.vdocuments.site/reader035/viewer/2022070616/5d4cfe3f88c993aa6c8b71c6/html5/thumbnails/23.jpg)
300
250
200 -en a.. ·z
UJ 150 500 PSI TRANSDUCER a: :::> (/) (/) LLJ a: 100 a.
50 200 PS l TRANSDUCER
0 ________________________ ..... ____ .._.
0 0.5 1.0 l.5 2.0 2.5 3.0 3.5
DEFLECTION IN INCHES
FIG. (4)- CALIBRAllON OF PRESSURE PICK-UP ELEMENTS
![Page 24: Gra4'1ate of ta - vtechworks.lib.vt.edu · A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI 'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of](https://reader035.vdocuments.site/reader035/viewer/2022070616/5d4cfe3f88c993aa6c8b71c6/html5/thumbnails/24.jpg)
mh1r"trt•A.,.. was ~itJrwttl the tl'.'iiee• ~- re~ded. u f~U.as $
first, a ~trd.ght•liM trac1: ~ triggtllt'i.t4 aeros1 se~u.Hn:i
'the calibrat1or~ ·Octl ~radiacop~. trae~ l'qnieat.~4
statie rr·~~ut• ~·r
.., ~Md, tha1teby
e.~l!!t!v•~JLml' •i:wH.U.~m.. iie:at*' tb.i atersl 'lli'1i!\''1.G1iO'Li
1oltu111td valve ~ tl.'i13ert~ a t:rac$
a6r~1 tlt.e ~(fr'lle.n. .. the h'!Me t~ 11a~r-~ presaure var11us
e~.. A.Mt.btil' atrats,llt 1he t:l"aee W&I tr1nerei, whte- reprfhi"tt~
•at'!. J"1tUIUl'e e~Mitlvi.ty ._. tben l"fNhw•d to ~-~ and
• tl'a" w~ Bde at.spbl.!1'1.c pi-ea«1'Ull'e.. ••~t., tim!ll cunre :li:Witeh
wo 4eprjlcsed au au ace~t• ·"tm $we vu produe~d.. 'fh!j W1Ut
~losei. .400 tin; ~_..r• chaq~ th~ 1d1utt:•r t" o:£te
a.e~. After tll-.tut!~ giratle~e, shutter ·wa agat~ 4•p:re.$•~d ..
!hi• pi-•vi.4641 a baeket'o•. hm!'isG!l~l amt vert1•1 liiuw~ spaced
1/i ~rt. ThiiJ g:rHtly fileilitat~d valv.a of pre$~uru
4.~ trace 01\ phot~rapii r• """~~ ··"'''"" film: w&e developad iri 20 11ee. (an aiditiont.1 sec. wu all~
extt• eoutr"t). Af'titl' p~toa;>t~h with~ pei~Mltti.=ti
""-"'"""""'"'""' 1tep wa tfJ aul,..e
tbill ta.11~.
![Page 25: Gra4'1ate of ta - vtechworks.lib.vt.edu · A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI 'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of](https://reader035.vdocuments.site/reader035/viewer/2022070616/5d4cfe3f88c993aa6c8b71c6/html5/thumbnails/25.jpg)
Y. IUD.Dlll'BL UIVLTI
Because of the cliffereace ltetweea the re1ult1 obta.'8,ed aacl tile
results 1oupt. thu 1ect1on of the the1ia u cU.vf.ded into pvc.:partas
f:lr1t, ch.e aetul result• an pre1eated au di.MU.and au 1ecou. a
cr1tka1 aaalyaia of the a:pedMatal apparatus i• pre1eatu.
ErtaM•t"B _. 1&H111&n 1& SM •m111·'.:!1l l.ta&11 fte re1ult1 olttaiMd from tile Gpft'imeatal 1et-.p an ..._. ta
fig. (S). Due to r8UOQ1 which will be diacuaeu lacer, all •f tile
plaotqraph1 alaowa a ut coafora to tlae format cleaer1"4 ia ·dla prevf.oua
aectieu of tllia tlle11a •
Ia ••t of the plaotoarapbl the trae of U. 11aady.ioetate pn11un
._ omitted and eal7 water•ham1r p1ae......,. •ftrial at tile val•
wa recoried. fte velectt1 of the water 1n tlla pf.pelf.•• 2.77 ,,.
waa tlw .... clurlq all of the nu for wlaloh tlae renlte are 1llowa1
tha•• for tlae ca1e of tutat...... closure, die ••i- overpr••RI'•
wu caleulatu to be 165 pet. ftla value wa1 ta clue ap ..... t with
all of tile renlt1 ea..a. The time 1eale at tile httoa·of ucta pMto-
ll*fh ha4 a fftCIUHJ of oae ld.11t see. aact for t-- preeaun aoale, one
taell repnaat.t 1JS pal. l'vtllermn., the 1-atll of '1ae 1/2 t.A. U.•
RI ao' 75 ft. kt JO ft. 'lid.a vu kcau1e all of the pMtoarapbs
•hen here were takn before the adclitloaal tuf.q wu taatallecl.
Before a oorrelaticm coal• be •de MtwMll the theoretkal renlt•
aa4 the uperimeatal result•, • ol>jeetS.ve -11911 of tile Gpft'imeatal
result• wu fouM te k uceaaary.
![Page 26: Gra4'1ate of ta - vtechworks.lib.vt.edu · A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI 'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of](https://reader035.vdocuments.site/reader035/viewer/2022070616/5d4cfe3f88c993aa6c8b71c6/html5/thumbnails/26.jpg)
(a)
(b)
Fig . (5) . Photographs. of the Water- Maumer Phenomenon History at the valve
![Page 27: Gra4'1ate of ta - vtechworks.lib.vt.edu · A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI 'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of](https://reader035.vdocuments.site/reader035/viewer/2022070616/5d4cfe3f88c993aa6c8b71c6/html5/thumbnails/27.jpg)
-26-
(c)
(d)
Fig . (5) Continued
![Page 28: Gra4'1ate of ta - vtechworks.lib.vt.edu · A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI 'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of](https://reader035.vdocuments.site/reader035/viewer/2022070616/5d4cfe3f88c993aa6c8b71c6/html5/thumbnails/28.jpg)
-27 ...
(e)
(f)
Fig. (5) Continued
![Page 29: Gra4'1ate of ta - vtechworks.lib.vt.edu · A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI 'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of](https://reader035.vdocuments.site/reader035/viewer/2022070616/5d4cfe3f88c993aa6c8b71c6/html5/thumbnails/29.jpg)
(g)
(h)
Fig. (5) Continued
![Page 30: Gra4'1ate of ta - vtechworks.lib.vt.edu · A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI 'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of](https://reader035.vdocuments.site/reader035/viewer/2022070616/5d4cfe3f88c993aa6c8b71c6/html5/thumbnails/30.jpg)
time trllc:~ was studied. It was
dope was never exactly the s.a.me. Ir'l fact, a
most of the tr a.:: fas. Iio'<o1•ever,
'positive dopes. the elopes w~re always
that the positive
disparity existed
ehapefJ of the
curves. and in
most cases were ident1Cill in ih<!!pe and ciu:v.ature. '!'be irregular
posH::bre dope was the tnnnn~r in the valve
closed in 0.5
milli see. and in another 3.5 milli sec. After the additional 25 ft.
of tubing was inatalled,
up its newly.attained
slope, there
of the positive
v~lve re~isted to speed
"~"r·~ ~~~~~ of eight milli s~e. As for the
the pouibility
combinations of f and F w.nves or to the fa.ct that a vapor cavity was
""""'"" .. upon the return the reflected wave reservoir.
Obviou$ly. only the conclu$ion wa~ feasible; howev~r, more
needed to be
before this could be proved.
Another i111;pm:t.i.nt
preciaeded the ef feetive closure of • It wa:e also noted
that ma.gn:U;;ude. duration, and length of time before closure of
it:1pulse varied somewhat '~ith each run.. 'l\lio posoi'bilities wtltre
considered that might have produced thb impulse. First,, it was con-
sidered :.;h&t th<i! imp.act of the valve clc:u.,.irt,th either mec.hanic.ally through
tbe transducer or through the el11-ctrieal ayste:m :L'tl the laboratory. might
![Page 31: Gra4'1ate of ta - vtechworks.lib.vt.edu · A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI 'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of](https://reader035.vdocuments.site/reader035/viewer/2022070616/5d4cfe3f88c993aa6c8b71c6/html5/thumbnails/31.jpg)
iatic of
1-n •pitlld• il~d durl!U.on with the i1ap:v.lse %)l'9lHfttre wav~. fuTth~l'· (S)
m.orfi&1 thfil "tult• ver~ p:r.iu&•nt•d Go11t~utor, th• 1u1ae typ~
•
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1tea a e1•9" e.._Uriatia. AIM.1 afMe .-17 .a Nfl•t .. ._. d
._.or awo ,.1 • ..,......_ • tM wl• of •• -1« ._.. _._., .&llt
,...u.UttJ of "8•'-t•ldaa iC _. •il. la-. ............... .
'' ........ Dat .... a. ... -- of .... Sllftda ..... .,,. .... . • ..._.. n•ltad tlte ftl• •IMilt--111 , .... •kf .. It ...... Dle
t• .. ,.....,. ., •fleeted ..... ,_ ....... .
,.... ............ ,. .... '* .. ftt ... dad ....... i.. ....
e.S.d _. M _. ... ..._ dae tll••••tteal .a _. . ..,....cal n•
mt• •f t11u t11aau.
6 lllDllMllY.1 tlll•M ti * IP'l' ... l ·6a-lll tlda aul18'8 IM ...._, wilt.ah pre ... tld a ..._... -118'8
.t • mleatd ad....,.,, .. _.... rill M •~ ,._. ....
Witll ...... ·- ............. ,....,_ ..., ................ .
of funn ..._tf.aadaaa. 1:118 -•...,......pat of die.,,_._ w1d6,......... ....
nalu f..- hU& atdaed .. tM •1-id ulw. h•tlully
..._, time lt wu elMd, a tr ... wu ,...._ .. wll,_ dlff_.. !nm tile
fl'ftUu ........ • ................. •lolNn ... ..U..,,fallad
repeatdly. Alt..._.. • Ml• .....,.11, .1 .... 1.a cw m.1u ..... , lt ..... -. urt.• Ina t.s ld.111 .... t• •IPt .Ult. .... ·
A 1t.-.le ltd -•11 r.•IJ fn tld.1 ,....,_ waa to 1-...11ea tM
1/1 fa. hlttaa aacu ea. Sneplarltiea of tM val• ei...n wre • ..,..,_.. ftt.a renlJ" wwld al• eUld.ute ... tn'l- aatad
., the ...,.1 ........ 1'8Pdl•• •f ...... -- '' -· ..........
![Page 33: Gra4'1ate of ta - vtechworks.lib.vt.edu · A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI 'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of](https://reader035.vdocuments.site/reader035/viewer/2022070616/5d4cfe3f88c993aa6c8b71c6/html5/thumbnails/33.jpg)
......._r, addttloul lenatu •f tulag would iadwe dalpiag of '118
waYU chae to tile iaueaaed eaer17 diaalpatioa. 'flau would U.•• ._naaecl the nflecU.oa fnm tbe t:ee to tile u:tnt tbat it .,..14
lane l>ea •011Pletel7 incli8tiapl11&able.
It wae 1-diately apparent after trylag to locate tile reflected
wa.e that tu ayat• aheuld not hne •- dealpe4 to pl'04blee aero
reflecU.on. luteacl, it ahotdd haft 1teea deaiped toduma ''"" aa
large a reflectCMI vaYe •• poaatble.
Aa vu acatecl earlier ia thta theata, re1¥lta wr• to haft l>eea
recordd vpatreaa fr• the tee. Sf.Dcua oaly oae trace coeld be re•
corded for each ••lye cleaun and aiace a particular clO&\fl'e eauld
aot be duplt&ated, tbeae reaultl WTe aot recorded.
It vu declclU that la all furtUl" f.lweatf.aatiou of thia tne. tl&at ued a valye wlllcb cleaed in-eplarly. tile best way t• obtala
aa accurate reecml of tlt.e preaaurea at the valve ad at tlw tee wcnald
1>e to ue a clual•beaa o.aeillONope.
![Page 34: Gra4'1ate of ta - vtechworks.lib.vt.edu · A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI 'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of](https://reader035.vdocuments.site/reader035/viewer/2022070616/5d4cfe3f88c993aa6c8b71c6/html5/thumbnails/34.jpg)
to be
t«ru itt•~lv•d ..
..
•
~et•
and w~.u1
![Page 35: Gra4'1ate of ta - vtechworks.lib.vt.edu · A 1!181' or DI lllLIC!lOB .. BAlllalllOB or A WATD•llAJl81 ftllSIU WA.VI llOH A DI 'fheal1 1111t&d.tt.e4 to tlae Gra4'1ate faculty of](https://reader035.vdocuments.site/reader035/viewer/2022070616/5d4cfe3f88c993aa6c8b71c6/html5/thumbnails/35.jpg)
~111.
the
.. only
2. It 1~ ~vi~nt
t~ of fitting.
to
of the • 4.
fw~tiol'linS of the valve ..
s. type, the pipeline
l'ld.t
•
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f
that
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'fM a~ 1• eat11s1/l7 pateffAl h k .. ~-Kt. Wlggm:t,. a.at~
Of t§ ~t~. J:R hlJl ialft'Ut1 ~DCOtD: ... at, aH gut~ -~
p ... :at:t.a d tKt ~s.-.. • ts 41•• t~ I• ..... itaa tkl•
i•~·-~ topiill.. Ike fltbM: ~- •f tM ~lta• -. ~
tlMtb ~a..~ -4 gut~a.
n.- .... ~l ... ~ fiuutd Qat•~ i!i!>!'.#•l!l!i'I
~~ Cl't'il ,., <tf • ... • ·~=
~·t'• .. 'fta atat:~
.. ,.~. au~ tif -.-,.ilw~illi~ ht• ~<1M1¥11fll* st~&es ..
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fte fellovt.q .,..1. U9e 1Mlea adopted fer .. la tllu t11e1u:
a•..,,. ftleoltJI
A • cnae..-tloaal ••
1- •wall t1lUkaea•l
• • 111nt.ua17 couaat;
c ........ , • .., ...... - ................... hltha ............ lea• (2)1 ,.
C'w arld.naq coutaal;
•· luU. U...aars • • antU-11117 ....... ,.
I • _..lu of elutf.cllJ ef •t.aai f • kro,..W.UNelt frtctia fac&ft
11- fNNtll'• ., .. u ... u.aa ta • x 11nce£H1
r • , ..... _.. ..... a ... u.aa la+ a 4linciloa1
• • aueleratf.H due to pnttJI ........ t • 1 ... ooefftateat •f tlie valwa
a • "11t _..lu of vatu I
~· • lt,..•llo 1•11 a.nae lbe t• j
4L• 4Ufer .... l»etwMll·ialtf.al _. u-aol• tee 1 ..... ,
& • tiMe after valye cleeuwe
Y • veloeltf I -'
X • U.taaH ......... .,etwe• fna tlle •1-..t.4 •alw.;
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0 • f WetVt\
te: fw~ve
t s ~oad:U;ton~ P W$.Y~ i&
th~
u ....
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14 ..
V .. L .. ~ W 1 C., ,a.~i:··~~Jt' Jmdrat~ lul,tw!lna rl~ tt:t~t1~·H1.~· uaiu ASCI, voi.
12:'0¢.
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