ASTM A333 ASTM A106/A53/API 5L GR.BX46, X52 Q345D, Q345E) 1. General chinangwa seamless simbi pombi ASTM A53 GR.B, simbi nhamba: SA53 B, tsanangudzo: 1/4′-28′, 13.7-7112. mm 2. Seamless simbi pombi ASTM A106 GR.B yekushanda kwekushisa kwepamusoro, nhamba yesimbi: SA106B, spec ...
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