兑水 发表于 2009-9-29 15:50:22

ASTM D 1990-2000 确定实尺样品分级试验中目测级量度木材的允...

D1990-00(2002)e1 Standard Practice for Establishing Allowable Properties for Visually-Graded Dimension Lumber from In-Grade Tests of Full-Size Specimens
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