I-ASTM A333 ASTM A106/A53/API 5L GR.BX46, X52 Q345D, Q345E) 1. Umbhobho wentsimbi engenamthungo osetyenziselwa injongo ngokubanzi i-ASTM A53 GR.B, inombolo yentsimbi: SA53 B, iinkcukacha: 1/4′-28′, 13.7-711.2mm 2. Umbhobho wentsimbi engenamthungo i-ASTM A106 GR.B yemisebenzi yobushushu obuphezulu, inombolo yentsimbi: SA106B, iinkcukacha...
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