ygs67 发表于 2015-11-18 14:57:44

ASTM A400-69(R12)

ASTM A400-69(R12) Standard Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties

admin 发表于 2015-11-19 10:26:35


谢谢您的分享,金币已奖励!
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