ygs67 发表于 2017-1-16 11:53:39

BS EN 14081-3-2012

BS EN 14081-3-2012 imber structures. Strength graded structural timber with rectangular cross section. Machine grading; additional requirements for factory production control

admin 发表于 2017-1-16 13:57:34

谢谢您的分享,金币已奖励!
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