Ishubhu lokupholisha insimbi engagqwali ye-AISI 304

Incazelo emfushane:

Ipayipi/ITHUBHU Elihlanganisiwe Lensimbi Engenasinti:
1. : Ibanga :201 202 304 304l 316 316l
2. Okujwayelekile:ASTM DIN JIS AISI GB
3. Ubuso: 2B I-BA NO.4 Isibuko 320# 380# 400#600# 800#
4. Ubude: 6M 11.5 M 12M noma Ngokwesidingo sakho.
5.OD : Ishubhu Eliyindilinga 9.52-219MM Ukujikeleza :10*10-150-150
6. Ukupakisha kwangaphakathi:PIsikhwama se-last
7. Ukupakisha Kwangaphandle: Ibhokisi/Ukupakisha Okulukiwe/Kokhuni
8.Od:+/- 0.2mm, Ubukhulu: +/- 0.02mm


Imininingwane Yomkhiqizo

Amathegi Omkhiqizo

Ishubhu lokupholisha insimbi engagqwali engu-304:

ishubhu yekhoyili yensimbi engagqwali
ikhoyili yeshubhu yensimbi engagqwali
ipayipi lekhoyili yensimbi engagqwali
ipayipi lekhoyili yensimbi engagqwali
abahlinzeki beshubhu yekhoyili yensimbi engagqwali
abakhiqizi beshubhu yekhoyili yensimbi engagqwali
ikhoyili yepayipi yensimbi engagqwali

Izakhiwo Ezijwayelekile
Ingxubevange 304Li-austenitic yensimbi engagqwali yochungechunge lwe-T-300, enobuncane obungu-18% we-chromium kanye no-8% we-nickel. Uhlobo lwe-304L lunomkhawulo wekhabhoni ongu-0.030. Yi-"stainless 18/8" ejwayelekile evame ukutholakala emapani nasemathuluzini okupheka. I-Alloys 304L iyi-alloy eguquguqukayo kakhulu futhi esetshenziswa kabanzi emndenini wensimbi engagqwali. Ilungele ukusetshenziswa okuhlukahlukene kwasekhaya nakwezentengiselwano, i-Alloys 304L ikhombisa ukumelana okuhle kakhulu nokugqwala futhi ilula kakhulu ukwenziwa, ukwakheka okuvelele. Izinsimbi ezingagqwali ze-austenitic nazo zibhekwa njengezingagqwali kakhulu kunezinsimbi ezine-alloy ephezulu futhi zingagqwaliswa yizo zonke izinqubo zokugqwaliza ezihlanganisiwe nezimelana nazo.
Imininingwane: UNS S30403
Izicelo:
I-Alloy 304L Stainless Steel isetshenziswa ezinhlobonhlobo zezicelo zasekhaya nezentengiselwano, okuhlanganisa:
Imishini yokucubungula ukudla, ikakhulukazi ekwenzeni ubhiya, ukucubungula ubisi, kanye nokwenza iwayini
Amabhentshi asekhishini, amasinki, imigqomo, imishini, nezinto zikagesi
Ukuhlobisa nokwakha izakhiwo
Ukusetshenziswa kwesakhiwo sezimoto nezindiza
Izinto zokwakha ezakhiweni ezinkulu
Izitsha zamakhemikhali, okuhlanganisa nezokuthutha
Izishintshi zokushisa
Amantongomane, amabhawodi, izikulufo, nezinye izinto zokubopha endaweni yasolwandle
Imboni yokudaya
Izikrini ezilukiwe noma ezishisiwe zokumba, ukumba amatshe kanye nokuhlunga amanzi
Amazinga:
I-ASTM/ASME: S30403
I-EURONORM: 1.4303
I-AFNOR: Z2 CN 18.10
I-DIN: X2 CrNi 19 11
Ukumelana Nokugqwala:
Ukumelana nokugqwala ezindaweni ezikhipha i-oxidation kuwumphumela we-chromium engu-18 kuya ku-19% equkethwe yi-alloy engu-304.
Ukumelana nama-organic acid anamandla aphakathi nendawo kuwumphumela we-nickel engu-9 kuya ku-11% equkethwe yi-alloys engu-304.
Ngezinye izikhathi, i-alloy 304L ingabonisa izinga lokugqwala eliphansi kune-carbon Alloy 304 ephezulu; ngaphandle kwalokho, i-304, 304L, kanye ne-304H ingabhekwa njengesebenza ngokufanayo ezindaweni eziningi ezigqwalisayo.
I-alloy 304L ikhethwa ukusetshenziswa ezindaweni ezigqwala ngokwanele ukubangela ukugqwala kwe-welds kanye nezindawo ezithinteke ekushiseni kuma-alloy asengozini.
Ukumelana Nokushisa:
Ukumelana okuhle kwe-oxidation ekusetshenzisweni okungenazikhawu kuya ku-1600°F kanye nasekusetshenzisweni okuqhubekayo kuya ku-1690°F.
Ukusetshenziswa okuqhubekayo kwe-304 kububanzi be-800-1580°F akukhuthazwa uma ukumelana nokugqwala kwamanzi okulandelayo kubalulekile.
Ibanga 304L limelana kakhulu nemvula ye-carbide futhi lingashiswa liye ezingeni lokushisa elingenhla.
Izakhiwo ze-304 Alloy
Izici Zokushisela:
Izakhiwo ezinhle kakhulu zokushisela; ukushisela ngemuva kokushisela akudingeki lapho kushiselwa izingxenye ezincane. Izinto ezimbili ezibalulekile okufanele uzicabangele ekukhiqizeni amajoyinti okushisela ezinsimbini ezingagqwali ze-austenitic yilezi:
ukulondolozwa kokumelana nokugqwala
ukugwema ukuqhekeka
Ukucubungula – Ukwakha Okushisayo:
Ukuze udale, shisa ukufana kufike ku-2100 / 2300 °F
Ungafaki i-foil ngaphansi kuka-1700 °F
Ukwakha kungapholiswa ngomoya ngaphandle kwengozi yokuqhekeka
Ukucubungula – Ukwakheka Kokubanda:
Isakhiwo sayo se-austenitic sivumela ukuthi idonswe ngokujulile ngaphandle kokufakwa kwe-annealing okuphakathi, okwenza lokhu kube yizinga lensimbi engagqwali elikhethwayo ekukhiqizeni amasinki, izinto ezingenalutho kanye nama-saucepan.
Lezi zigaba zisebenza ngokuqina ngokushesha. Ukuze kuncishiswe ukucindezeleka okubangelwa ukwakheka noma ukusonta okunzima, izingxenye kufanele zifakwe ngokuphelele noma zisuswe ukucindezeleka ngokushesha okukhulu ngemva kokwakheka.
Ukusebenziseka kalula:
Kunconywa ukusebenzisa ama-chip breaker ngoba ama-chip angaba yizintambo. Insimbi engagqwali kufanele iqine ngokushesha, ukudla okunzima, amathuluzi abukhali, kanye nokusetha okuqinile kufanele kusetshenziswe.

Izakhiwo Zamakhemikhali:

  C Mn Si P S Cr Ni N
304L 0.03ubuningi 2.0ubuningi 0.75ubuningi 0.45ubuningi 0.03ubuningi ubuncane: 18.0 ubuningi: 20.0 ubuncane: 8.0 ubuningi: 12.0

Ubuningi obungu-0.10

Izakhiwo Zemishini:

Ibanga Amandla Okudonsa ksi (iminithi) Amandla Okukhiqiza 0.2% ksi (iminithi) Ukwandiswa % Ubulukhuni (Brinell) MAX Ubulukhuni (Rockwell B) MAX
304L 70 25 40 201 92

Izakhiwo Ezibonakalayo:

Ubuningi
lbm/ngaphakathi3
Ukuqhuba Okushisayo
(BTU/h ft. °F)
Ugesi
Ukumelana
(ku-x 10-6)
I-Modulus ye
Ukunwebeka
(psi x 106
Isilinganiso sokusebenza kahle
Ukwanda Kokushisa
(ngaphakathi/ngaphakathi)/
°F x 10-6
Ukushisa Okuqondile
(BTU/lb/
°F)
Ukuncibilika
Ibanga
(°F)
ku-68°F: 0.285 9.4 ku-212°F 28.3 ku-68°F 28 9.4 ku-32 – 212°F 0.1200 ku-68°F kuya ku-212°F 2500 kuya ku-2590
12.4 ku-932 °F 39.4 ku-752°F 10.2 ku-32 – 1000°F
49.6 ku-1652 °F 10.4 ku-32 – 1500°F

Imininingwane:

Into: ipayipi lokupholisha insimbi engagqwali

Uhlobo: okushiselwe noma okungenamthungo

Okujwayelekile: ASTM A554 JIS, DIN

Ibanga: 201,202, 304, 304L, 316, 316L, 409, 430, njll.

Usayizi: Ipayipi eliyindilinga: OD 8-219m

Ipayipi Lesikwele: OD 10x10mm -150x150mm

Ipayipi Eliyisikwele: 10x20mm kuya ku-120x180mm

Ubukhulu: 0.2-4.0mm

Ubuso bepayipi: 180G, 320G, 400G, 500G, 600G, i-Satin, umugqa wezinwele, 2B, i-BA, isibuko, 8K

Ubude bepayipi: 5.8m 6M 11.85M 12m

Isicelo:

1. Ukusetshenziswa kokuhlobisa (umgwaqo, ibhuloho lesandla, isitimela, isitimela sebhasi, isikhumulo sezindiza kanye nejimu

2. Ukwakhiwa kanye nokuhlobisa

3. Indawo yezimboni (i-petroleum, ukudla, amakhemikhali, iphepha, umanyolo, indwangu, izindiza kanye ne-nyukliya.

Ishubhu Yensimbi Eyisikwele (mm) Ishubhu Lensimbi Engunxande
(mm)
Ishubhu Lensimbi Eliyindilinga
(mm)
10×10×0.6~3.0 10×20×0.6~3.0 6×0.6~1.0
15×15×0.6~3.0 20×30×0.6~3.0 12×0.6~1.5
20×20×0.6~3.0 20×40×0.6~3.0 13×0.6~1.5
25×25×0.6~3.0 25×50×0.6~3.5 16×0.6~2.0
30×30×0.6~3.5 30×50×0.6~3.5 19×0.6~3.0
40×40×0.6~3.5 40×60×0.6~3.5 20×0.6~3.0
50×50×0.6~3.5 40×80×0.6~3.5 22×0.6~3.0
60×60×0.6~3.5 60×80×1.0~6.0 25×0.6~3.0
70×70×0.6~3.5 50×100×1.0~6.0 27×0.6~3.0
75×75×0.6~3.5 60×120×1.0~6.0 32×0.6~3.0
80×80×1.0~6.0 80×120×2.0~8.0 40×0.6~3.5
100×100×2.0~8.0 80×160×2.0~8.0 38×0.6~3.0
120×120×2.0~8.0 100×150×2.0~8.0 48×0.6~3.5
150×150×2.0~8.0 100×200×2.0~8.0 60×0.6~3.5
200×200×4.0~16.0 150×250×4.0~12.0 76×0.6~3.5
250×250×4.0~16.0 200×300×4.0~16.0 89×1.0~6.0
300×300×4.0~16.0 300×400×4.0~16.0 104×1.0~6.0
400×400×4.0~16.0 300×500×4.0~16.0 114×1.0~6.0

Izakhiwo ezibonakalayo zepayipi lokupholisha insimbi engagqwali:

Ibanga

Ukwakheka, %

Ikhabhoni,
ubuningi

I-Manga-
isiNese,
ubuningi

I-Phos-
i-phorus,
ubuningi

Isibabule,
ubuningi

I-Silicon,
ubuningi

I-Nickel

I-Chromium

I-Molybdenum

I-Titanium

I-Columbium + i-Tantalum

I-Austenitic
301

0.15

2.00

0.040

0.030

1.00

6.0–8.0

16.0–18.0

302

0.15

2.00

0.040

0.030

1.00

8.0–10.0

17.0–19.0

304

0.08

2.00

0.040

0.030

1.00

8.0–11.0

18.0–20.0

304L

0.035A

2.00

0.040

0.030

1.00

8.0–13.0

18.0–20.0

305

0.12

2.00

0.040

0.030

1.00

10.0–13.0

17.0–19.0

309S

0.08

2.00

0.040

0.030

1.00

12.0–15.0

22.0–24.0

...

309S-Cb

0.08

2.00

0.040

0.030

1.00

12.0–15.0

22.0–24.0

B

310S

0.08

2.00

0.040

0.030

1.00

19.0–22.0

24.0–26.0

316

0.08

2.00

0.040

0.030

1.00

10.0–14.0

16.0–18.0

2.0–3.0

316L

0.035A

2.00

0.040

0.030

1.00

10.0–15.0

16.0–18.0

2.0–3.0

317

0.08

2.00

0.040

0.030

1.00

11.0–14.0

18.0–20.0

3.0–4.0

321

0.08

2.00

0.040

0.030

1.00

9.0–13.0

17.0–20.0

C

330

0.15

2.00

0.040

0.030

1.00

33.0–36.0

14.0–16.0

347

0.08

2.00

0.040

0.030

1.00

9.0–13.0

17.0–20.0

B

429

0.12

1.00

0.040

0.030

1.00

Umkhawulo ongu-0.50

14.0–16.0

430

0.12

1.00

0.040

0.030

1.00

Umkhawulo ongu-0.50

16.0–18.0

430-Ti

0.10

1.00

0.040

0.030

1.00

Ubuningi obungu-0.075

16.0–19.5

5 × C min,

Ubuningi obungu-0.75

 

Ibanga lezinto zokwakha ipayipi eligoqiwe lensimbi engagqwali/amashubhu agoqiwe:

I-USA

IJAMANI

IJAMANI

IFRANCE

IJAPANE

I-ITALY

ISWEDEN

I-UK

I-EU

I-SPAIN

IRUSSIA

I-AISI

I-DIN 17006

I-WN 17007

I-AFNOR

I-JIS

I-UNI

I-SIS

I-BSI

I-EURONORM

201

I-SUS 201

301

X 12 CrNi 17 7

1.4310

Z 12 CN 17-07

I-SUS 301

X 12 CrNi 1707

23 31

301S21

X 12 CrNi 17 7

X 12 CrNi 17-07

302

X 5 CrNi 18 7

1.4319

Z 10 CN 18-09

I-SUS 302

I-X 10 CrNi 1809

23 31

302S25

X 10 CrNi 18 9

X 10 CrNi 18-09

12KH18N9

303

I-X 10 CrNiS 18 9

1.4305

I-Z 10 CNF 18-09

I-SUS 303

I-X 10 CrNiS 1809

23 46

303S21

I-X 10 CrNiS 18 9

I-X 10 CrNiS 18-09

303 Se

I-Z 10 CNF 18-09

I-SUS 303 Se

I-X 10 CrNiS 1809

303S41

I-X 10 CrNiS 18-09

12KH18N10E

304

X 5 CrNi 18 10

X 5 CrNi 18 12

1.4301

1.4303

Z 6 CN 18-09

I-SUS 304

X 5 CrNi 1810

23 32

304S15

304S16

X 6 CrNi 18 10

X 6 CrNi 19-10

08KH18N10

06KH18N11

304 N

I-SUS 304N1

X 5 CrNiN 1810

304 H

I-SUS F 304H

I-X 8 CrNi 1910

X 6 CrNi 19-10

304 L

X 2 CrNi 18 11

1.4306

Z 2 CN 18-10

I-SUS 304L

X 2 CrNi 1911

23 52

304S11

X 3 CrNi 18 10

X 2 CrNi 19-10

03KH18N11

X 2 CrNiN 18 10

1.4311

Z 2 CN 18-10-Az

I-SUS 304LN

X 2 CrNiN 1811

23 71

305

Z 8 CN 18-12

I-SUS 305

X 8 CrNi 1812

23 33

305S19

X 8 CrNi 18 12

X 8 CrNi 18-12

Z 6 CNU 18-10

I-SUS XM7

I-X 6 CrNiCu 18 10 4 Kd

309

I-X 15 CrNiS 20 12

1.4828

Z 15 CN 24-13

I-SUH 309

I-X 16 CrNi 2314

309S24

X 15 CrNi 23 13

309 S

I-SUS 309S

X 6 CrNi 2314

X 6 CrNi 22 13

310

X 12 CrNi 25 21

1.4845

I-SUH 310

I-X 22 CrNi 2520

310S24

20KH23N18

310 S

X 12 CrNi 25 20

1.4842

Z 12 CN 25-20

I-SUS 310S

X 5 CrNi 2520

23 61

X 6 CrNi 25 20

10KH23N18

314

X 15 CrNiSi 25 20

1.4841

I-Z 12 CNS 25-20

X 16 CrNiSi 2520

X 15 CrNiSi 25 20

20KH25N20S2

316

X 5 CrNiMo 17 12 2

1.4401

Z 6 CND 17-11

I-SUS 316

X 5 CrNiMo 1712

23 47

316S31

X 6 CrNiMo 17 12 2

X 6 CrNiMo 17-12-03

316

X 5 CrNiMo 17 13 3

1.4436

Z 6 CND 17-12

I-SUS 316

X 5 CrNiMo 1713

23 43

316S33

X 6 CrNiMo 17 13 3

X 6 CrNiMo 17-12-03

316 F

X 12 CrNiMoS 18 11

1.4427

316 N

I-SUS 316N

316 H

I-SUS F 316H

I-X 8 CrNiMo 1712

X 5 CrNiMo 17-12

316 H

I-X 8 CrNiMo 1713

X 6 CrNiMo 17-12-03

316 L

X 2 CrNiMo 17 13 2

1.4404

Z 2 CND 17-12

I-SUS 316L

X 2 CrNiMo 1712

23 48

316S11

X 3 CrNiMo 17 12 2

X 2 CrNiMo 17-12-03

03KH17N14M2

X 2 CrNiMoN 17 12 2

1.4406

Z 2 CND 17-12-Az

I-SUS 316LN

X 2 CrNiMoN 1712

316 L

X 2 CrNiMo 18 14 3

1.4435

Z 2 CND 17-13

X 2 CrNiMo 1713

23 53

316S13

X 3 CrNiMo 17 13 3

X 2 CrNiMo 17-12-03

03KH16N15M3

X 2 CrNiMoN 17 13 3

1.4429

Z 2 CND 17-13-Az

X 2 CrNiMoN 1713

23 75

X 6 CrNiMoTi 17 12 2

1.4571

I-Z6 CNDT 17-12

X 6 CrNiMoTi 1712

23 50

320S31

X 6 CrNiMoTi 17 12 2

X 6 CrNiMoTi 17-12-03

08KH17N13M2T

10KH17N13M2T

I-X 10 CrNiMoTi 18 12

1.4573

X 6 CrNiMoTi 1713

320S33

X 6 CrNiMoTI 17 13 3

X 6 CrNiMoTi 17-12-03

08KH17N13M2T

10KH17N13M2T

X 6 CrNiMoNb 17 12 2

1.4580

Z 6 CNDNb 17-12

X 6 CrNiMoNb 1712

X 6 CrNiMoNb 17 12 2

08KH16N13M2B

I-X 10 CrNiMoNb 18 12

1.4583

X 6 CrNiMoNb 1713

X 6 CrNiMoNb 17 13 3

09KH16N15M3B

317

I-SUS 317

X 5 CrNiMo 1815

23 66

317S16

317 L

X 2 CrNiMo 18 16 4

1.4438

Z 2 CND 19-15

I-SUS 317L

X 2 CrNiMo 1815

23 67

317S12

X 3 CrNiMo 18 16 4

317 L

X 2 CrNiMo 18 16 4

1.4438

Z 2 CND 19-15

I-SUS 317L

X 2 CrNiMo 1816

23 67

317S12

X 3 CrNiMo 18 16 4

330

X 12 NiCrSi 36 16

1.4864

Z 12NCS 35-16

I-SUH 330

321

X 6 CrNiTi 18 10

I-X 12 CrNiTi 18 9

1.4541

1.4878

I-Z 6 CNT 18-10

I-SUS 321

X 6 CrNiTi 1811

23 37

321S31

X 6 CrNiTi 18 10

I-X 6 CrNiTi 18-11

08KH18N10T

321 H

I-SUS 321H

I-X 8 CrNiTi 1811

321S20

I-X 7 CrNiTi 18-11

12KH18N10T

329

X 8 CrNiMo 27 5

1.4460

I-SUS 329J1

23 24

347

X 6 CrNiNb 18 10

1.4550

Z 6 CNNb 18-10

I-SUS 347

X 6 CrNiNb 1811

23 38

347S31

X 6 CrNiNb 18 10

X 6 CrNiNb 18-11

08KH18N12B

347 H

I-SUS F 347H

I-X 8 CrNiNb 1811

I-X 7 CrNiNb 18-11

904L

1.4939

Z 12 CNDV 12-02

X 20 CrNiSi 25 4

1.4821

I-UNS31803

X 2 CrNiMoN 22 5

1.4462

I-UNS32760

X 3 CrNiMoN 25 7

1.4501

Z 3 CND 25-06Az

403

X 6 Cr 13

X 10 Cr 13

X 15 Cr 13

1.4000

1.4006

1.4024

Z 12 C 13

I-SUS 403

X 12 Cr 13

23 02

403S17

X 10 Cr 13

X 12 Cr 13

X 6 Cr 13

12Kh13

405

X 6 CrAl 13

1.4002

Z 6 CA 13

I-SUS 405

X 6 CrAl 13

405S17

X 6 CrAl 13

X 6 CrAl 13

X 10 CrAl 7

1.4713

Z 8 CA 7

X 10 CrAl 7

X 10 CrAl 13

1.4724

X 10 CrAl 12

10Kh13SYu

X 10 CrAl 18

1.4742

X 10 CrSiAl 18

15Kh18SYu

409

X 6 CrTi 12

1.4512

Z 6 CT 12

I-SUH 409

X 6 CrTi 12

409S19

X 5 CrTi 12

X 2 CrTi 12

410

X 6 Cr 13

X 10 Cr 13

X 15 Cr 13

1.4000

1.4006

1.4024

Z 10 C 13

Z 12 C 13

I-SUS 410

X 12 Cr 13

23 02

410S21

X 12 Cr 13

X 12 Cr 13

12Kh13

410 S

X 6 Cr 13

1.4000

Z 6 C 13

I-SUS 410S

X 6 Cr 13

23 01

403S17

X 6 Cr 13

08Kh13

Ifektri

imboni yepayipi_副本

Inzuzo yekhwalithi:

Ikhwalithi yemikhiqizo yethu yomugqa wokulawula emkhakheni kawoyela negesi iqinisekiswa hhayi nje ngesikhathi senqubo yokukhiqiza elawulwayo kodwa nangendlela yokuhlolwa komkhiqizo oqediwe. Ukuhlolwa okuvamile kufaka phakathi:

1. Ukuhlolwa okungabhubhisi

2. Ukuhlolwa kwe-Hydrostatic

3. Izilawuli zokuqeda ubuso

4. Izilinganiso zokunemba kobukhulu

5. Ukuhlolwa kwe-Flare kanye ne-coning

6. Ukuhlolwa kwempahla yemishini neyamakhemikhali

Isicelo se-caillary tube

1) Imboni yamadivayisi ezokwelapha

2) ukulawulwa kokushisa kwezimboni okuqondiswa izinga lokushisa, ipayipi elisetshenzisiwe yizinzwa, i-thermometer yeshubhu

3) Ipayipi eliyinhloko lemboni yokunakekelwa kwamapeni

4) i-antenna ye-micro-tube, izinhlobo ezahlukene ze-antenna yensimbi engagqwali eqondile encane

5) Ngezinhlobo ezahlukene ze-capillary yensimbi engagqwali ye-elekthronikhi enobubanzi obuncane

6) Ubucwebe bokubhoboza ngenaliti

7) Amawashi, isithombe

8) Ishubhu le-antenna yemoto, ama-antenna ebha asebenzisa amashubhu, ishubhu le-antenna

9) Imishini yokuqopha nge-laser yokusebenzisa ishubhu lensimbi engagqwali

10) Izinto zokudoba, izesekeli, uYugan uphumile ephethe

11) Ukudla nge-capillary yensimbi engagqwali

12) zonke izinhlobo ze-stylus yocingo oluphathwayo i-stylus yekhompyutha

13) Imboni yamapayipi okushisa, imboni kawoyela

14) Amaphrinta, inaliti yebhokisi elithule

15) Donsa ipayipi lensimbi engagqwali elincibilika kabili elisetshenziswa emafasiteleni ahlanganisiwe

16) Izinhlobo ezahlukene zamashubhu ensimbi engagqwali aqondile ezimbonini ezincane

17) Ukusabalalisa ngokunemba ngezinaliti zensimbi engagqwali

18) Imakrofoni, ama-headphone kanye nemakrofoni ukusebenzisa ishubhu lensimbi engagqwali, njalo njalo

ukupakisha amapayipi

222

 

ishubhu yekhoyili yensimbi engagqwali


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