lotus999 发表于 2014-12-1 19:02:36

JIS A 1801:1989

JIS A 1801:1989 Methods of Test for Production Control of Concrete (Method of Test for Sand Eqivalent Value of Fine Aggregates for Concrete)

admin 发表于 2014-12-2 12:50:02

谢谢您的分享,金币已奖励
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