I-weldid Erw Erw Pipe
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I-ASTM i-A500 yangaphambi kwentsimbi yentsimbi
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I-BS 1387 ishushu-dip ye-dipvanity yentsimbi
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I-ASTM A795 HOT-DIP-DIP ye-erw ye-erw yentsimbi yentsimbi
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I-ASTM A53 Gr.b iHip-Dip ye-Depvanity ye-WelDed Pipe
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Ukuchasana nombane kwi-Erw Erw pipes Erw Tubes
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I-SAN 657-3, En 10305, Din 2391 I-pipes yentsimbi / iityhubhu zentsimbi
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Imibhobho ye-Scache
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Isikwere kunye ne-tubes