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ERW Pipe / ASTM A53 : Grade A, B, C, D, API 5L: A, B, …

ERW Pipe / ASTM A53 : Grade A, B, C, D, API 5L: ... ASTM A53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

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