ASTM A333 ASTM A106/A53/API 5L GR.BX46, X52 Q345D, Q345E) 1. Jeneral objektif tiyo asye san pwoblèm ASTM A53 GR.B, nimewo asye: SA53 B, espesifikasyon: 1/4′-28′, 13.7-711.2 mm 2. Tiyo asye san pwoblèm ASTM A106 GR.B pou operasyon tanperati ki wo, nimewo asye: SA106B, espèk...
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