兑水 发表于 2009-9-9 08:34:24

ASTM A 795-2004 防火用黑色及热浸镀锌的焊接和无缝钢管

A795/A795M-04 Standard Specification for Black and Hot-Dipped Zinc-Coated (Galvanized) Welded and Seamless Steel Pipe for Fire Protection Use
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