Umbhobho wentsimbi engenamthungo
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I-ASTM A335 P91 Uhlobo lwe-Tubes / P5 / P5 / P5 / P1 / P12 / P12 p22
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I-A213 T22 i-tubes yentsimbi ye-AL22 yentsimbi / imibhobho
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I-slotting pipe yentsimbi yendawo yokulawula
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I-oyile i-oyile kakuhle intsimbi yentsimbi 5ct L80 BTC R3
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API 5ct n80 R3 ping pile yentsimbi kakuhle
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I-ASTM A106 GR.B yentsimbi yentsimbi yamanzi
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I-API 5l yentsimbi yentsimbi yegesi yeoyile
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I-API 5L ASTM A106 A333 okanye i-A335 ye-carbon yentsimbi
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I-API 5ct, j55, k55, l80, i-N80 yentsimbi kunye netyhubhu