Introduction
Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
Standard: ASTM A53/A53M/ASME SA-53/ SA-53M
Grade: Gr.A 、Gr.B
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Standard: ASTM A53/A53M/ASME SA-53/ SA-53M
Grade: Gr.A 、Gr.B