... strength test 强度试验 strength timber 建筑用材 strengthen 增强，加固 ...
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strength classes of structural timber 木材强度等级
strength of timber 木材强度
Timber strength grading 锯材强度分等
Characteristic values of strength-graded timber 强度分级木材的特性值
strength timber
木材强度
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Further down the supply chain, timber-dealers and factories are often certified largely on the strength of documents which may be illegally bought.
ECONOMIST: Western consciences can do only so much to conserve forests
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