ygs67 发表于 2015-11-6 11:41:40

ASTM A490M-14a

ASTM A490M-14a Standard Specification for High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural Steel Joints (Metric)

admin 发表于 2015-11-6 14:47:28

谢谢您的分享,金币已奖励!

nbjwbzj 发表于 2016-7-20 10:39:33

谢谢分享！！！！！！！
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