kangroo 发表于 2015-11-22 19:12:06

D 421 – 85 (Reapproved 2002)

Standard Practice for Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants

admin 发表于 2015-11-23 15:26:07

谢谢您的分享,金币已奖励!
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