lishengfu1304 发表于 2018-5-28 16:46:58

Designation: C 457 – 98

本帖最后由 lishengfu1304 于 2018-5-28 19:19 编辑

Standard Test Method for
Microscopical Determination of Parameters of the Air-Void
System in Hardened Concrete


admin 发表于 2018-5-29 15:59:29

谢谢您的分享，金币已奖励!
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