Bakin Karfe Mara Sumul
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ASTM A213 / ASME SA213 T11 T22 Alloy Karfe Mai ƙera Bututu Marasa Sumul
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Bututun Karfe na JIS G3454 STPG 370 don Sabis na Matsi - Womic Steel Group
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ASTM A335 P91 Bututun Nau'i 2 / P5 / P9 / P11 / P12 / P22
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Bututun Karfe / Bututun SA213 T22 Mara Sumul
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Bututun Karfe Mai Rami Don Hanyar Ruwa Mai Sarrafawa
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Rijiyar Mai Bututun Karfe API 5CT L80 BTC R3
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Bututun Karfe na API 5CT N80 R3 don Rijiyar Mai
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ASTM A106 GR.B Bututun Karfe mara sumul don ruwa
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Bututun ƙarfe mara sumul API 5L don iskar gas