ASTM A333 ASTM A106/A53/API 5L GR.BX46, X52 Q345D, Q345E) 1. Cholinga chachikulu cha chitoliro chosasunthika cha ASTM A53 GR.B, nambala yachitsulo: SA53 B, ndondomeko: 1/4'-28′, 13.7-7112. mm 2. Chitoliro chachitsulo chosasunthika ASTM A106 GR.B cha ntchito zotentha kwambiri, nambala yachitsulo: SA106B, spec...
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