ygs67 发表于 2015-7-2 09:52:31

ASTM A595_A595M-11

ASTM A595_A595M-11 Standard Specification for Steel Tubes, Low-Carbon or High-Strength Low-Alloy,Tapered for Structural Use

admin 发表于 2015-7-2 11:41:07

谢谢您的分享,金币已奖励!
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