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Патент USA US3100112

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Aug. 6, 1963
G. s. MlcAN ETAL
3,100,107
SOAKING PIT
Original Filed Jan. 1‘7, 1958
3 Sheets-Sheet 2
Né
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INVENTORS
650265 .5. ,1l/¿24N
Aug. 6, 1963
G. s. MlcAN ETAL
3,100,107
SOAKING PIT
Original Filed Jan. 17, 1958
5 Sheets-Sheet 3
United States Patent O
l
3,100,167
1
1C@
Patented Aug. 6, 1963
2
.
„if
drawings, reference numeral 2 indicates a soaking pit
which has a dual hea-ting chamber with two compart
ments 4 and 6 separated by a wall :8 having «an opening
10 therethrough. Two rows of steel ingots S are arranged
in each yof the compartments 4 and 6. The furnace Z is
George S. Micah, Pittsburgh, Pa., and Clarence W. Sid
well, Flossmoor, Ill., assigner-s to United States Steel
Corporation, a corporation of New lIersey
Continuation of application Ser. No. 709,675, lan. 17,
1958.
is application Nov. 23, 1960, Ser. No. '71,212
9 Claims. (Cl. 263-15)
supported on transverse beams 12 which in turn are sup
ported on longitudinal ,beams 14. The beams 14 are sup'
-por'ted on spaced columns 16 so as to provide an opening
rllhis application which relates to a soaking pit and
more particularly to a soaking pit for heating steel ingots
beneath the soaking pit. A removable cover 18 of any
standard type is pnovided for the chambers 4l and 6. A
pair of heat exchangers or regeneratons 20A and ZtlB are
is a continu-ation of our co-pending application Serial No.
connected to the chambers 4 and 6 by means of flues 22A
709,675, tiled Ianuary 17, 1958, now abandoned. In the
soaking pits of which we have knowledge, especially
.those using low calorilic fuel, the heated lair from the
and 212B, respectively. The bottoms of the flues 22A and
22B are a short distance :above the bottom or the cham
bers 4 yand 6. Bunners 24A «and 24B «are directed through
regenerato-rs or recuperators is delivered to the heating
chamber over a bridge wall. One such type soaking pit is
the walls of flues 22A and 22B, respectively. rIlhe ingo-ts
S rest on the usual coke bed 26. A cleanout opening 28
is provided in each lof the compartments 4 and 6». The
shown in the Isley Patent No. 1,852,306, dated April 5,
1932. Since this bridge wall is exposed to high tempera
lines 22A and 22B open into the heating chamber in
tures on three sides, chil-l boxes are provided in the 20 spaced relationship to the adjacent walls of the compart
bridge wall in an attempt to cool the wall and to mini
ments d and t6 so as to provide offsets 39A and 30B.
mize the eifect of slag cutting. However, overheating of
’Ibis keeps the burning «gases 'away from the sidewalls of
the chambers and prevents lay-passing of the ingots. 'Ilhe
length L of the soaking pit 2 is such that the llues 22A
.the bridge wall and breakthroughs due to soupy materials
on the heating 'chamber bottom yoften occurs. The bridge
wall also prevented proper heating of the bottom of the
ingots in front of the port from the regenerators. Con
struction of prior soating pits is also such that there is
little provision for removing cinder, coke, ‘breeze and the
like from beneath the furnace. The regeneratcrs and
and 22B are separated ‘and need not have a common wall
as in :the conventional construction. This prevents, cir
culation of «air and line gas between the ñues and also
permits ready repair. The flues 22A .and 22B are long
(for example, ten feet or more) so that a space 32 is
ñues Aare also close together so that a common wall was 30
provided therebetween. This resulted in leakage of air
cinder »and the like. This construction also enables the
regenerators 20A and 20B to be located in a lean-to 34
and llue gases from íorne flue and regenerator to the other.
The regenerators were also located close to the heating
located outside the main building 36, thus increasing the
capacity of the soaking pit shop.
chamber, thus cutting down «the available space for clean
ing and repairing.
provided in the basement to permit ready removal of
rThe operation of the soaking pit is as follows.:
Assuming that air is passing through the flue 22A and
soaking pit wherein the chill plate and bridge wall are
the )burner 24A is delivering fuel, the «fuel and air -will
eliminated.
mix and bum and the burning gases will pass into cham
Another object is to provide such a soaking pit in which
ber 4 land out through opening 10 into chamber 6. The
space is provided beneath the soaking pit for removing 40 gases then pass through the llue 22B «and the regenerator
cinder, coke breeze and the like.
201B to the stack. After la. given period of time the soak
Still another object is to provide a soaking pit wherein
ing pit is reversed in the usual manner and air heated in
the danger of leakage of air and flue gas is reduced and
the regenerator 20B Iwill pass through flue 22B where it
wherein the Iflues :and regenerators lare readily accessible
is mixed with fuel from the burner 24A. The burning
for repair.
45 gases pass ythrough the chamber 6 and out through open
A further object is to provide a soaking pit wherein
ing il@ to the chamber 4. 'I'he gases then pass through
35
It is therefore :an object of our invention to provide a
the Ifuel and air are intimately mixed and the heat is
readily transferred to all parts of the ingots.
These and other objects will »be more apparent after
referring to the following specification and attached
drawings, in which:
FIGURE 1 is a sc .ematic sectional plan view taken
on the line I_I of FIGURE 2;
FIGURE 2 is »a view taken «on the line II-ll of FIG
URE l;
FIGURE 3 is a View taken on the line IIII-III of FIG
URE 1;
the llue 22A and the regenerator 20A land out the stack.
Because o-f the construction of the flues and compart
ments l¿l and 6 the fuel and air are well mixed and the
gases `are directed to all corners of the heating chamber.
If desired, a recuperator 38 may be used in place of
the regenerators 20A and 20B in `which case there will be
Ano reversal of the furnace and the flue 22B will be con
nected to the recuperator 38 as showln in FIGURE 4.
In the embodiment of our invention shown in FIG
URE 5 a single chamber 40 is provided for the ingots
S with the construction otherwise being the same as in
FIGURE 4 is a View similar to FIGURE l but show
FIGURES 1 to 3. Here, too, the length L of the soak
ing the soaking pit provided with a recuperato-r rather
ing pit is suñicient to permit separate walls for the flues
than with regenen-alors;
60 22A and 22B and the regenerators 20A -and 20B. The
FIGURE 5 is a View, similar to FIGURE l, showing a
operation of this soaking pit is the Same as that of FIG
third embodiment of our invention;
URES 1 to 3. In other Words, the fuel for burner 24A
FIGURE 6 is a View, similar to FIGURE l, showing a
and the heated air from line 22A are mixed and burned
with the burning gases passing in a U-shaped path through
[fourth embodiment of `our invention;
FIGURE 7 is a view, similar to >FIGURE 1, showing a 65 the chamber 46 and exhausting ‘through the flue 22B.
Upon reversal the fuel from burners 24B and the heated
iifth embodiment of our invention;
air from flue 22B are mixed and burned with the burning
FIGURE 8 is Ia View, similar to FIGURE l, Showing
gases passing in a U-shaped path through the chamber
a sixth embodiment of our invention; and
49 to the flue 22A.
FIGURE 9 is a view, similar to FIGURE 1, showing a 70
FIGURE 6 shows »another type of heating chamber 42
seventh embodiment of our invention.
which is similar to that of FIGURE 5 except that one
Referring more particularly to FIGURES 1 to 3 of the
side of the chamber is rounded at `¿t4 to facilitate gas
3,100,107
3
ñow. The other parts of the soaking pit are otherwise
the same 4as in FIGURES 1 to 3 and the operation thereof
is lthe same.
j
FIGURE 7 shows another embodiment of our inven
tion in which the soaking pit has ftwo compartments 46
and 48 having a wall 50 therebetween with an opening
52 therein. A regenerator 54 is connected by means of
a flue 56 to one end of the chamber 46 and by la tlue
58 to the other end of the chamber 46. Burners 60 and
62 are provided in the walls of dues 56 and 58, respec
tively. The arrangement of the lines except for the neces
sity of additional bends is the same `as in the other ern
bodiments. A regenerator 64 is connected to one end
of chamber 48 through ñue 66 and to the other end
A
chamber, the spacing of said columns and the distance
between the bottoms of said beams and `the bottoms of
said columns being such as »to permit free circulation of
air and ready accessibility to the bottom of said heating
chamber, ya heat exchanger for beating air, a long general
-ly horizontal lìue connecting said heat exchanger to said
chamber, means for delivering fuel into said ñue at the
end adjacent said chamber, and means for supporting
said flue with an air space therearound, said last named
means including vertical columns spaced apart longitu
dinally and transversely of said flue, spaced horizontal
beams supported by said last named columns beneath
said line for supporting said liuc, the spacing of said last
through ñue 68. A burner 70 is provided in the wall of
flue 66 and a similar 4burner 72 is provided in the wall
of nue 68. The arrangement of the iiues 66 and 68 is
named columns and the distance between the bottoms of
said last named beams xand the bottoms of said last named
columns being such as to permit free circulation of air
and ready accessibility to the bottom of said flue.
62 is mixed with hot air yfrom regenerator 54 and the
burning gases pass through chamber 46 »and opening 52
chamber, spaced horizontal beams supported by said
columns beneath said heating chamber for supporting
2. A soaking pit for heating ingots comprising a heat
the same as the arrangement of flues 56 and 58. The
ing chamber for receiving ingots, vertical columns spaced
construction is otherwise essentially the same as in FIG
URES 1 to 3. In operation, ‘fuel from ‘burners 60 and 20 yapart longitudinally and transversely of said heating
to chamber 48. The gas then passes through ñues 66
and 68 to the regenerator 64. Upon reversal »the fuel
from burners 70 and 72 is mixed with hot air from
tregenerator 64 and the burning -gases pass from «chamber
48 through opening 52 to the chamber 46. The gases
then pass from chamber 46 through flues 56 and 58 to
regenerator 5 4.
FIGURE 8 shows a somewhat diiîerent embodiment of 30
our invention in which two chambers 74 and 76 are pro
vided in spaced apart relationship- A regenerator 78
the heating chamber, the spacing of said columns and the
distance between the bottoms of said beams and the bot
.toms of said .columns being Asuch as to permit free circula
tion of air and -ready accessibility to the bottom of said
heating chamber, -two regenerators, a long ilue connecting
`each of said regenerators :to said chamber, means for
selectively delivering air into said lines from said re
generators, means for selectively delivering fuel into the
«air carrying ilue at the end adjacent said chamber, means
for supporting each of said ilues with an air space there
around, each of said last named means including vertical
is connected to one end of chamber 74 through a ñue
columns spaced apart longitudinally land transversely of
80. A similar regenerator 82 is connected to one end
of chamber 76 through a liuc 84. A regenerator 86 is 35 the associated flue, spaced horizontal beams supported
by said .last named columns beneath said associated flue
connected to the other end of chambers 74 and 76
for supporting said associated line, the spacing of said
through a ñue 88 having branches 88A and 88B.
last named columns and the distance between the bot
toms of said last named beams and the bottoms of said
84, 88A and 88B, respectively, in the same manner ‘as
in the other embodiments. The arrangement of the parts 40 last named columns being such as to permit free circula
tion of air and ready accessibility to the bottom of said
is otherwise essentially the same as that of the other
associated flue.
embodiments. In the operation of this soaking pit fuel
3. A soaking pit for heating ingots comprising a heat
from burners 90 and 92 will mix with hot air `from re
ting chamber for receiving ingots, vertical columns spaced
generators 78 and 82. The burning gases pass through
Burners 90, 92, 94 and 96 are provided in the flues 80,
chambers 74 and 76 and through the flue 88 »to the re
generator 86. Upon reversal fuel from 'burners 94 and
96 will mix with hot air from the regenerator 86. The
burning gasses pass through chambers 74 and 76 to the
apart longitudinally and transversely of said heating cham
ber, spaced horizontal beams supported by said columns
beneath said heating chamber for supporting the heating
chamber, the spacing of said columns and the distance
between the bottoms of said beams and the bottoms of
FIGURE 9 shows still another embodiment of our in 50 said columns being such as to permit free circulation of
air and ready accessibility to the bottom of said ‘beating
vention having a heating chamber 98. A regenerator
chamber, two regenerators arranged on one side of the
100 is connected to one lcorner of heating chamber 98
heating chamber in spaced apart relationship with each
by means of a flue 102. A regenerator 104 is connected
other and with the 4heating chamber, a long liuc connect
to the diagonally opposite corner of chamber 98 through a
ing each of said regenerators to said chamber, means for
ilue 106. Construction of the combustion chamber, flues
selectively delivering air into said flues from said regen
and regenerators is otherwise essentially the same as in
erators, means for selectively delivering fuel into the air
the other embodiments. Burners 108 and 110 are pro
carrying flue at the end adjacent said chamber, the con
vided in the ilues 102 and 106, respectively. In opera
nections of said liues to said heating chamber being in
rtion fuel from burner 108 mixes with hot air from re
generator 100 and the burning gases pass through the 60 spaced apart relationship on the same side of said heat
ing chamber as the regenerators so that the yfuel burns
chamber 98 containing the ingots S in a “Z” path and then
and travels in a generally U-shaped path from one flue to
through the ilus 106 to regenerator 104. Upon reversal
the other, and means for supporting each of said ñues
fuel from burner 110 mixes with hot air Áfrom regenerator
with an air space therearound, each of said last named
104 and the burning gases pass through the chamber 98
«to `the flue 102 and then to the regenerator 100.
65 means including vertical columns spaced apart longitudi
nally and transversely of the associated flue, spaced hori
While several embodiments of our invention have been
zontal beams supported by said last named columns be
shown and described it will be apparent that other adapta
regenerators 78 and 82, respectively.
neath said associated flue for supporting said associated
flue, the spacing of said last named columns and the dis
We claim:
70 tance between the bottoms of said last named beams and
the bottoms of said last named columns being such as to
1. A soaking pit :for heating ingots comprising a heating
permit free circulation of air and ready accessibility to the
chamber for receiving ingots, vertical columns spaced
bottom of said associated ñue.
apart ‘longitudinally and transversely of said heating cham
tions and modifications may be made without departing
from the-scope of the following claims.
4. A soaking pit for generally rectangular heating ingots
ber, spaced horizontal beams supported by said columns
beneath said heating chamber for supporting the heating 75 comprising a heating chamber for receiving ingots, said
5
3,100,107l
chamber having diagonally opposite corners vertical col
umns spaced apart longitudinally `and transversely of said
heating chamber, spaced horizontal beams supported by
said columns beneath said heating chamber for suppont
ing the heating chamber, the spacing of sa’id columns and
6
flue at the end adjacent said chamber, the connections of
said flues to said heating chamber being in spaced apart
relationship on the same side of said heating chamber
as »the regenerators so that the fuel burns and travels in
a generally U-shaped path from one flue to the other,
the distance between the bottoms of said beams and the
and means for supporting each of said ñues with an air
bottoms of said columns being such as to permit free cir
space therearound, each of said last named means includ
culation of air and ready accessibility -to the bottom of
ing vertical columns spaced apart longitudinally and trans
said heating chamber, two regenerators, a long ñue con
versely of said line, spaced horizontal beams supported
necting each of said regenerators to salid chamber, means
by said last named columns beneath said ñue for sup
for selectively delivering air into said fines from said re
porting said line, the spacing of said last named columns
generators, means for selectively delivering fuel into the
and the distance between the bottoms of said last named
air carrying flue at the end adjacent said chamber, said
beams and the bottoms of said last named columns being
ñues being connected to said heating chamber on diago
such as to permit free circulation of air and ready accessi
nally opposite corners of said heating chamber, and means 15 bility to the bottom of said associated line.
for supporting each of said ñues with an air space there
7. A soaking pit tor heating ingots comprising a heat
around, each of said last named means including vertical
ing chamber -for receiving ingots, vertical columns spaced
columns spaced ‘apart longitudinally and transversely of
apart longitudinally and transversely of said heating
the associated iiue, spaced horizontal beams supported by
chamber, spaced horizontal beams supported by said
said last named columns beneath said associated :due for 20 columns beneath said heating chamber for supporting
supporting said associated flue, the spacing of said last
named columns and the distance between the bottoms of
said last named beams and the bottoms of said last named
columns being such as to permit free circulation of air and
the heating chamber, the spacing of said columns and
the distance between the bottoms of said beams and the
bottoms of said columns being such -as to permit free
circulation of air and ready accessibility »to the bottom
ready accessibility to the bottom of said associated flue. 25 of said heating cham-ber, two regenerators spaced from
5. A soaking pit for generally rectangular heating ingots
said heating chamber with the bottoms thereof being at
comprising a heating chamber for receiving ingots, ver
a level at least substantially as high as the bottom of
tical columns spaced apart longitudinally and transversely
the heating chamber, means for supporting said regen
of said heating chamber, spaced horizontal beams sup
erators so as to penrnit free circulation of air thereunder,
ported by said columns beneath said heating chamber 30 a long ñue connecting each of said regenerators to said
for supporting the heating chamber, the spacing of said
chamber, means for selectively delivering air into said
columns and the distance between the bottoms of said
beams and the bottoms of said columns being such as to
flues `from said regenerators, means for selectively de
livering fuel into the air carrying iiue at the end adjacent
permit free circulation of air and ready accessibility to
said chamber, means `for supporting `each of said lines
the bottom of said heating member, a heat exchanger for 35 with an air space therearound, each of said last named
heating air, a long generally horizontal tine connecting
means including vertical columns spaced apart longitu
said heat exchanger to said chamber, the bottom of said
dinally and transversely of the associated flue, and spaced
ñue being a short distance above the plane of ‘the bottom
horizontal beams -supported by said last named columns
of said heating chamber and the top of sa‘id flue being a
beneath said associated flue =for supporting said associated
substantial distance below the top of said chamber, said
ilue, the spacing of said last named columns and the
flue opening into said heating chamber through one wall
distance between the bottoms of said last named beams
of said heating chamber in spaced relationship to the wall
and »the bottoms of said last named columns being such
of said heating chamber adjacent said one wall, means
as to permit free circulation of air and ’ready accessi
for delivering fuel into said line at the end adjacent said
bility to the bottom of said associated iiue.
chamber, and means for supporting said ilue with an air
8. A soaking pit for heating ingots comprising a heat
space therearound, said last named means including ver
tical columns spaced apart longitudinally and transversely
of said iiue, spaced horizontal beams supported by said
ing chamber `for receiving ingots, vertical columns spaced
‘apart longitudinally and transversely of said heating
chamber, spaced horizontal beams supported by said col
last named columns beneath said tlue for supporting said
ñue, the spacing of said last named columns and the dis 50 rumns beneath said heating chamber for supporting the
heating chamber, the spacing of said columns and the
tance between the bottoms of said last named beams and
«distance between the bottoms of said beams and the
the bottoms of said last named columns being such as to
bottoms of said columns being such as to permit free
permit free circulation of air and ready accessibility to
circulation of air and ready accessibility to the bottom
the bottom of said hue, said ñue adjacent said chamber
increasing in cross section toward its outlet into said 55 of said heating chamber, two regenerators arranged on
one side of the heating chamber in spaced apart relation
chamber.
ship with each other and with the heating chamber, the
6. A soaking pit for heating ingots comprising a heat
bottoms of said regenerators being at a level at least
ing chamber for receiving ingots, vertical columns spaced
substantial-ly
as high as the bottom of the heating cham
apart longitudinally and transversely of said heating cham
ber, spaced horizontal beams supported by said columns 60 ber, means yfor supporting said regenerators so as to per
mit free circulation of air thereunder, each of said last
beneath said heating chamber for supporting the heating
named means including vertical columns spaced apart
chamber, the spacing of said columns and the distance
longitudinally and transversely `of the lassociated regen
between the bottoms of said beams and the bottoms of
erator, a long substantially horizontal ñue connecting
said columns being such as to permit free circulation of
air and ready accessibility to the bottom of said heating 65 each of said regenerators to said chamber, means for
selectively delivering air into said flues from said re
chamber, two regenerators arranged on one side of the
generators, means for selectively delivering fuel into the
heating chamber in spaced apart relationship with each
'air carrying flue at the end adjacent said chamber, the
other »and with the heating chamber, a long ñue connect
connections of said ñues to said heating chamber being
ing each of said regenerators to said chamber, the bottoms
or" said ñues being a short distance above the plane of 70 in spaced apart relationship on the same side of said heat
ing chamber as the regenerators so that the fuel burns
the bottom of said heating chamber, the end of each flue
and travels in a generally U-shaped path Vfrom one flue
adjacent said heating chamber increasing in cross-section
to the other, and means ffor supporting each of said flues
toward its outlet into said chamber, means for selectively
with an ai-r space therearound, each of said llast named
delivering air into said tlues from said regenerators, and
means for selectively delivering fuel into the air carrying 75 means including vertical columns spaced apart longitu
dinally and transversely of the lassociated nue, spaced
3,100,107
8
means for selectively delivering fuel into the air carry
ing flue at the end adjacent said chamber, the connec
tions of said dues to said Lheating chamber being in
spaced apart relationship `on the same side of said heat
horizontal beams supported by said last named columns
beneath said associated flue for supporting said asso
ciated due, the spacing of said -last named columns and
the distance between thebottoms of said last named
beams and the bottoms of said last named columns being
sucxh as to permit rtree circulation of air »and ready acces
sibility to the bottom of said associated ñue.
ing chamber as the regenerators so that the fuel burns
and travels inV a generally U-shaped path from one ilue
to the other, `and means for supporting each of said ñues
with an air space therearound, each of said last named
means including vertical columns spaced apa-rt longitu
dinally and transversely of said ñue and spaced hori
zontal beams supported by said last named columns be
neath said ñue -for supporting said ñue, the spacing of
said last named .columns and the distance between the
bottoms of said last named beams and the bottoms of
said last named columns being such as to permit free
9. A soaking pit `for beating ingots comprising a heat
ing chamber lfor lreceiving ingots, vertical columns spaced
apart longitudinally `and transversely of said heating
chamber, spaced horizontal beams supported by said col
umns beneath said heating chamber rfor supporting the
heating chamber, the spacing of said columns and the
distance between the Ibottoms of said beams and the bot
toms of said columns lbeing such as to permit free cir 15
circulation of air and ready accessibility -to the bottom
culation of ait- and ready accessibili-ty to the bottom of
of said associated ñue.
said beating chamber, two regenerators arranged on one
side of the heating chamber in spaced apart relationship
with `each other and 'with the heating chamber, the bot
toms of said regenerators being at a level at least sub 20
stantially as high as the bottom of the beating chamber,
means Vfor supporting said regenerators so as to permit
References Cited in the ñle of this patent
UNITED STATES PATENTS
59,214
Hall et al. ___________ __ Oct. 30, 1866
1,307,338
Baumann ____________ __ lune 24, 1919
1,805,001
Naisrnith et al _________ __ May 12, 1931
1,978,191
2,061,376
2,179,848
Forter ______________ __ Oct. 23, 1934
Geer ________________ _, Nov. 17, 1936
Forter ______________ __ Nov. 14, 1939
of said heating chamber, the end of each ilue adjacent
said heating chamber increasing in cross-section toward 30
2,196,321
2,351,661
2,397,810
Morton et al ___________ __ Apr. 9, 1940
Catter et al. _________ __ June 20, 1944
Roof _________________ __ Apr. 2, 1946
its outlet -into said chamber, means for selectively de
2,795,409
Hall ______ __ ________ __ Iune 11, 1957
3,052,456
Pugsley et al ___________ __ Sept. 4, 1962
free circulation »of air thereundeneach of said last named
means including vertical columns spaced apart longitu
dinally and transversely of the associated regenerator, a
long substantially horizontal iiue connecting each of
25
said regenerators to said chamber, the bottoms of said
ilues being a short distance above the plane of .the bottom
livering air into said ñues from said regenerators, and
UNITED STATES PATENT oEEICE
CERTIFICATE OF CORRECTION
Patent No., 3, lO() , 107
August 6,
1963
George S, Mican et a1n
It ís hereby certified that error appears in the above numbered pat
ent requiring correction and that the said Letters Patent should read as
corrected below.
Column ¿l9 line 74, strike out "generally rectangular" and
insert the same after “3" in line 75, same column ¿1; column 5,
line 26, strike out. "generally rectangular" and inserte the same
after "a" ín line 27„ same Column 5; column 5, line 35Í for
"member"
read
-_
chamber
‘-»-„
Signed and sealed this 25th day of February 1964a
(SEAL)
Attest:
EDWIN L: REYNOLDS
ERNEST W. SWIDER
Attesting Officer
Ac t i ng Commissioner of Patents
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