ygs67 发表于 2016-1-22 08:10:57

ASTM C935-13

ASTM C935-13 Standard Specification for General Requirements for Prestressed Concrete Poles Statically Cast

nbjwbzj 发表于 2016-1-22 10:33:34

谢谢分享!!!!!!!

admin 发表于 2016-1-22 17:01:26

谢谢您的分享,金币已奖励!
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