qzcp 发表于 2013-5-21 06:55:32

ASTM A 53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coa

ASTM A 53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coa Seamless

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admin 发表于 2013-5-21 11:15:38


谢谢您的分享,金币已奖励,以后最好带上版本号

nbjwbzj 发表于 2013-6-8 14:53:43

怎么没有版本号???
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