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现行木材缺陷标准(ГОСТ 2140—43)规定下列几大类木材缺陷:1.节子,按一定的特征分成许多类别;2.变色和腐朽,分为内部的和外部的变色与腐朽;3.虫害,按蛀蚀的尺寸分类;
The current standard for wood defects (ГОСТ 2140-43) specifies the following major categories of wood defects: 1. knots, divided into many categories according to certain characteristics; 2. discoloration and decay, divided into internal and external discoloration and decay; Pests, according to the size of the decay;