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Umuyoboro udafite umugozi wa mm 1500 n'amavuta astm a53 a106 inyanja ...
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Igurishwa rishyushye ry’ubwiza bwo hejuru gahunda ya st52 40 y’inyanja yoroheje ...
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Imigozi ikonje ya ASTM A53 A106 API 5L Grade B...
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Agakoresho gashyushye ka A53 Grade B sch40 gafite uburebure bwa santimetero 1 kugeza kuri 6...
