ASTM A333 ASTM A106/A53/API 5L GR.BX46, X52 Q345D, Q345E) 1. General nzube enweghị nkebi ígwè ọkpọkọ ASTM A53 GR.B, ígwè nọmba: SA53 B, nkọwa: 1/4′-28′, 13.7-711.2. mm 2. Seamless ígwè ọkpọkọ ASTM A106 GR.B maka elu okpomọkụ arụmọrụ, ígwè nọmba: SA106B, spec ...
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