ASTM A53A53M - 05 (in Chinese) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless 下载页数共22页
ASTM A53A53M - 05 (in Chinese) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
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