yixiaoxiao 发表于 2017-5-27 13:56:28

ASTM A2-90 下载

ASTM A2-90(Reaaproved 1997)
Standard Specification for carbon steel Girder Rails of Plain, Grooved, Guard Types

admin 发表于 2017-5-27 16:43:41

谢谢您的分享,金币已奖励!
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