ASTM 201 304 304L 316 316L 321 S32205 S32750 Chitsulo Chosapanga Chitsulo Chosapanga Chilichonse Chozizira Chojambulidwa
Kufotokozera Kwachidule:
Chitoliro chachitsulo chopanda Stianless / TUBE
1. : Giredi :201 202 304 304l 316 316l
2. Standard:ASTM DIN JIS AISI GB
3. Pamwamba: 2B BA NO.4 Galasi 320# 380# 400#600# 800#
4.Utali: 6M 11.5 M 12M kapena Malinga ndi zomwe mukufuna.
5.OD : Chubu Chozungulira 9.52-219MM Kuzungulira :10*10-150-150
6. Kulongedza mkati
Chikwama cha Lastiki
7. Kupaka Kwakunja: Katoni / Yolukidwa / Yopaka Matabwa
8.Od:+/- 0.2mm, Kunenepa: +/- 0.02mm
ASTM 201 304 304L 316 316L 321 S32205 S32750 Chitsulo Chozizira Chopanda Msoko Chopanda Chitsulo,
Chitoliro cha Chitsulo Chosasemphana cha China ndi Chitoliro Chosasemphana cha 304,
Chitoliro cholondola cha ASTM A-312 cha chitsulo chosapanga dzimbiri cha giredi 201
Chitoliro chachitsulo chosapanga dzimbiri ndi chimodzi mwa zipangizo zodziwika bwino m'mafakitale omanga ndi uinjiniya. Chitoliro chachitsulo chosapanga dzimbiri ndi mpiringidzo wachitsulo wopanda kanthu, mapaipi ambiri omwe amagwiritsidwa ntchito ponyamula madzi, monga mafuta, gasi, madzi, gasi, nthunzi, chosinthira kutentha, makina ochanika.
Zopangira zozungulira zachitsulo chosapanga dzimbiri:
chubu chosapanga dzimbiri chachitsulo chozungulira
choyimbira chachitsulo chosapanga dzimbiri
chubu chachitsulo chosapanga dzimbiri
chitoliro chosapanga dzimbiri cha koyilo
ogulitsa chubu chachitsulo chosapanga dzimbiri chopanda zingwe
opanga chubu chosapanga dzimbiri chopangira koyilo
choyimbira chachitsulo chosapanga dzimbiri
Kufotokozera
Muyezo:ASTM A-312、ASTM A-269、ASTM A-632、ASTM A-213, DIN 17458、DIN17456 JIS G3463、JIS G3459、JIS G3448
Kalasi Yopangira Zinthu:201/202/304/316
Chidutswa chakunja:0.1mm–8mm
Kukhuthala:0.05mm – 2.1mm
Utali:2440mm, 3050mm, 5800mm, 6000mm, 6100mm kapena ngati pempho la kasitomala
Kulekerera:a) Chidutswa chakunja: +/- 0.2mm
b) Kunenepa: +/- 10% KAPENA ngati pempho la kasitomala
c) Utali: +/- 10mm
Pamwamba:Satin / Tsitsi Lopindika: 180#, 320#
Chipolishi:400# ,600# ,800# kapena pamwamba pa galasi
Ntchito:Zimakonzedwa kukhala zitsulo, zogwirira ntchito, zitseko ndi mawindo
KUPAKIRA
Chikwama cha pulasitiki / kulongedza kolukidwa (chonde tumizani zambiri zolongedza kwa ife ngati muli ndi zofunikira zina)
Kapangidwe ka mankhwala
| Giredi | C(Zambiri) | Mn(Max) | P(Max) | S(Max) | Si(Max) | Cr | Ni | Mo | N(Zambiri) | Cu/Zina |
| 304 | 0.08 | 2 | 0.045 | 0.03 | 1 | 18.00-20.00 | 8.00-10.50 | - | 0.1 | - |
| 304L | 0.03 | 2 | 0.045 | 0.03 | 1 | 18.00-20.00 | 8.00-12.00 | - | 0.1 | - |
| 310S | 0.08 | 2 | 0.045 | 0.03 | 1.5 | 24.00-26.00 | 19.00-22.00 | - | - | - |
| 316 | 0.08 | 2 | 0.045 | 0.03 | 1 | 16.00-18.00 | 10.00-14.00 | 2.00-3.00 | - | - |
| 316L | 0.03 | 2 | 0.045 | 0.03 | 1 | 16.00-18.00 | 10.00-14.00 | 2.00-3.00 | 0.1 | - |
Chinthu 201 202 304 316 S31803 S32750
C ≤0.15 ≤0.15 ≤0.08 ≤0.08 ≤0.030 ≤0.030
Si ≤1.00 ≤1.00 ≤1.00 ≤1.00 ≤1.00 ≤0.80
Mn 5.5-7.5 7.5-10.0 ≤2.00 ≤2.00 ≤2.00 ≤1.20
P ≤0.060 ≤0.060 ≤0.045 ≤0.045 ≤0.030 ≤0.035
S ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.020 ≤0.020
Cr 16-18 17-19 18-20 16-18 21-23 21-23
Ni 3.5-5.5 4.0-6.0 42958 43022 4.5-6.5 6.0-8.0
Mo 2.0-3.0 2.5-3.5 3.0-5.0
N ≤0.25 ≤0.25 0.08-0.2 0.24-0.32
Cu ≤0.50
Katundu wa makina
Chinthu Chamtengo Wapatali 201 202 304 316 S31803 S32750
Mphamvu Yokoka (MPa) ≥655 ≥620 ≥515 ≥515 ≥620 ≥800
Mphamvu Yotulutsa (MPa) ≥260 ≥310 ≥205 ≥205 ≥450 ≥550
Kutalika (%) ≥35 ≥35 ≥35 ≥35 ≥25 ≥15
Kulimba (HV) ≤230 ≤230 ≤200 ≤200 ≤303 ≤323
Zofunikira Zina
Kulemba: kalasi yazinthu, muyezo, kufotokozera, kutentha palibe.
Chithandizo cha pamwamba: Chowala bwino, chopukutidwa kunja ndi mkati.
Phukusi: mtolo woluka, bokosi lamatabwa kapena bokosi lachitsulo
Satifiketi yoyesera ya Mill: malinga ndi EN 10204 3.2
Kuyang'anira: Kuyang'anira kwa chipani chachitatu, kapena ndi makasitomala
Kufotokozera Kampani:
Kampani yathu ili ndi mizere itatu yopangira ya chubu chosapanga dzimbiri chozungulira, chitoliro chachitsulo chosapanga dzimbiri, tili ndi chidziwitso chotumiza kunja kwa zaka zoposa khumi, kupindika, kutambasula, kudula macheka, kuponda, kupukuta ndi zina zotero, zinthu zathu zosapanga dzimbiri zomwe zimagwiritsidwa ntchito kwambiri mu bafa, zowonjezera za hanger, zida zamagetsi, ndi zida zotenthetsera madzi a condensation, zinthu za hotelo ndi zina zotero. Kampani yathu ikukhulupirira ndi mtima wonse kuti makasitomala akunyumba ndi akunja apereka zojambula kapena zitsanzo.
Ngati mukufuna kudziwa zambiri zokhudza chitoliro/chubu chachitsulo chosapanga dzimbiri, chonde titumizireni uthenga.
Ngati mukufuna kudziwa zambiri zokhudza chitoliro/chubu chachitsulo chosapanga dzimbiri, chonde titumizireni uthenga.
| Chitsulo chachitsulo cha Square (mm) | Chitsulo chachitsulo chozungulira (mm) | Chitsulo Chozungulira (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 |
Kapangidwe ka chitoliro chopukutira chitsulo chosapanga dzimbiri:
| Giredi | Kapangidwe, % | |||||||||
| Mpweya, | Manga- | Phos- | Sulfure, | Silikoni, | Fakitoli | Chromium | Molybdenum | Titaniyamu | Columbium + Tantalum | |
| 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 | 0.50 pasadakhale | 14.0–16.0 | ... | ... | ... |
| 430 | 0.12 | 1.00 | 0.040 | 0.030 | 1.00 | 0.50 pasadakhale | 16.0–18.0 | ... | ... | ... |
| 430-Ti | 0.10 | 1.00 | 0.040 | 0.030 | 1.00 | 0.075 pasadakhale | 16.0–19.5 | ... | 5 × mphindi C, | ... |
| 0.75 pasadakhale | ||||||||||
▼Chitsulo chosapanga dzimbiri chozungulira machubu / machubu ozungulira kalasi yazinthu:
| USA | Germany | Germany | FRANCE | JAPAN | ITALY | SWEDEN | UK | EU | SPAIN | RUSSIA |
| AISI | DIN 17006 | WN 17007 | AFNOR | JIS | UNION | SIS | BSI | EURONORM | ||
| 201 | SUS 201 | |||||||||
| 301 | X 12 CrNi 17 7 | 1.4310 | Z 12 CN 17-07 | 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 | SUS 302 | X 10 CrNi 1809 | 23 31 | 302S25 | X 10 CrNi 18 9 | X 10 CrNi 18-09 | 12KH18N9 |
| 303 | X 10 CrNiS 18 9 | 1.4305 | Z 10 CNF 18-09 | SUS 303 | X 10 CrNiS 1809 | 23 46 | 303S21 | X 10 CrNiS 18 9 | X 10 CrNiS 18-09 | |
| 303 Se | Z 10 CNF 18-09 | SUS 303 Se | X 10 CrNiS 1809 | 303S41 | 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 | SUS 304 | X 5 CrNi 1810 | 23 32 | 304S15 304S16 | X 6 CrNi 18 10 | X 6 CrNi 19-10 | 08KH18N10 06KH18N11 |
| 304 N | SUS 304N1 | X 5 CrNiN 1810 | ||||||||
| 304 H | SUS F 304H | X 8 CrNi 1910 | X 6 CrNi 19-10 | |||||||
| 304 L | X 2 CrNi 18 11 | 1.4306 | Z 2 CN 18-10 | 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 | SUS 304LN | X 2 CrNiN 1811 | 23 71 | |||||
| 305 | Z 8 CN 18-12 | SUS 305 | X 8 CrNi 1812 | 23 33 | 305S19 | X 8 CrNi 18 12 | X 8 CrNi 18-12 | |||
| Z 6 CNU 18-10 | SUS XM7 | X 6 CrNiCu 18 10 4 Kd | ||||||||
| 309 | X 15 CrNiS 20 12 | 1.4828 | Z 15 CN 24-13 | SUH 309 | X 16 CrNi 2314 | 309S24 | X 15 CrNi 23 13 | |||
| 309 S | SUS 309S | X 6 CrNi 2314 | X 6 CrNi 22 13 | |||||||
| 310 | X 12 CrNi 25 21 | 1.4845 | SUH 310 | X 22 CrNi 2520 | 310S24 | 20KH23N18 | ||||
| 310 S | X 12 CrNi 25 20 | 1.4842 | Z 12 CN 25-20 | SUS 310S | X 5 CrNi 2520 | 23 61 | X 6 CrNi 25 20 | 10KH23N18 | ||
| 314 | X 15 CrNiSi 25 20 | 1.4841 | 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 | 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 | 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 | SUS 316N | |||||||||
| 316 H | SUS F 316H | X 8 CrNiMo 1712 | X 5 CrNiMo 17-12 | |||||||
| 316 H | 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 | 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 | 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 | 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 | ||
| 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 | |||||
| X 10 CrNiMoNb 18 12 | 1.4583 | X 6 CrNiMoNb 1713 | X 6 CrNiMoNb 17 13 3 | 09KH16N15M3B | ||||||
| 317 | SUS 317 | X 5 CrNiMo 1815 | 23 66 | 317S16 | ||||||
| 317 L | X 2 CrNiMo 18 16 4 | 1.4438 | Z 2 CND 19-15 | 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 | 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 | SUH 330 | ||||||
| 321 | X 6 CrNiTi 18 10 X 12 CrNiTi 18 9 | 1.4541 1.4878 | Z 6 CNT 18-10 | SUS 321 | X 6 CrNiTi 1811 | 23 37 | 321S31 | X 6 CrNiTi 18 10 | X 6 CrNiTi 18-11 | 08KH18N10T |
| 321 H | SUS 321H | X 8 CrNiTi 1811 | 321S20 | X 7 CrNiTi 18-11 | 12KH18N10T | |||||
| 329 | X 8 CrNiMo 27 5 | 1.4460 | SUS 329J1 | 23 24 | ||||||
| 347 | X 6 CrNiNb 18 10 | 1.4550 | Z 6 CNNb 18-10 | SUS 347 | X 6 CrNiNb 1811 | 23 38 | 347S31 | X 6 CrNiNb 18 10 | X 6 CrNiNb 18-11 | 08KH18N12B |
| 347 H | SUS F 347H | X 8 CrNiNb 1811 | X 7 CrNiNb 18-11 | |||||||
| 904L | 1.4939 | Z 12 CNDV 12-02 | ||||||||
| X 20 CrNiSi 25 4 | 1.4821 | |||||||||
| UNS31803 | X 2 CrNiMoN 22 5 | 1.4462 | ||||||||
| 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 | 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 | 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 | 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 | 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 | SUS 410S | X 6 Cr 13 | 23 01 | 403S17 | X 6 Cr 13 | 08Kh13 |
Fakitale
Ubwino wa khalidwe:
Ubwino wa zinthu zathu zoyendetsera mafuta ndi gasi umatsimikizika osati panthawi yokonza zinthu zokha komanso poyesa zinthu zomalizidwa. Mayeso wamba ndi awa:
1. Mayeso osawononga
2. Mayeso a Hydrostatic
3. Zowongolera zomaliza pamwamba
4. Miyeso yolondola ya miyeso
5. Mayeso a Flare ndi coning
6. Kuyesa katundu wa makina ndi mankhwala
Ntchito chubu cha caillary
1) Makampani opanga zida zamankhwala
2) kuwongolera kutentha kwa mafakitale kotsogozedwa ndi kutentha, masensa ogwiritsidwa ntchito ndi chitoliro, thermometer ya chubu
3) Chitoliro chachikulu cha makampani osamalira mapeni
4) antenna ya micro-tube, mitundu yosiyanasiyana ya antenna yaing'ono yolondola yosapanga dzimbiri
5) Ndi mitundu yosiyanasiyana yamagetsi yaying'ono yamagetsi yokhala ndi chitsulo chosapanga dzimbiri
6) Zodzikongoletsera zoboola ndi singano
7) Mawotchi, chithunzi
8) Chubu cha antenna ya galimoto, ma antenna ozungulira pogwiritsa ntchito machubu, chubu cha antenna
9) Zipangizo zojambula ndi laser zogwiritsira ntchito chubu chachitsulo chosapanga dzimbiri
10) Zida zosodza, zowonjezera, Yugan ali ndi
11) Zakudya zokhala ndi capillary yachitsulo chosapanga dzimbiri
12) mitundu yonse ya stylus ya foni yam'manja ndi stylus ya kompyuta
13) Makampani opangira mapaipi otentha, makampani opangira mafuta
14) Makina osindikizira, singano ya bokosi losalankhula
15) Kokani chubu chachitsulo chosapanga dzimbiri chosungunuka kawiri chomwe chimagwiritsidwa ntchito polumikizana ndi mawindo
16) Machubu achitsulo chosapanga dzimbiri osiyanasiyana a mafakitale
17) Kugawa bwino ndi singano zachitsulo chosapanga dzimbiri
18) Maikolofoni, mahedifoni ndi maikolofoni yogwiritsira ntchito chubu chachitsulo chosapanga dzimbiri, ndi zina zotero
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