1) knot
节疤
1.
The impacts of the dimension and quantity of knots,the growth rate and the slight grain angle on propagation velocity of the stress wave were studied,and the regressive analysis of the relationship between the wooden samples containing defects and propagation velocity of the stress wave were made.
通过对落叶松材试件进行的应力波检测试验,研究了木材节疤尺寸和数量、生长率等对应力波传播速度的影响,并对节疤尺寸等与应力波传播速度之间关系进行了回归分析。
2) encased knot
枯木节疤
3) knotting
去节疤
4) knotting
涂饰节疤
5) clean timber ,clear wood
无节疤木材
补充资料：节疤
1.竹子和树木的主干砍去枝节后留下的疤痕。 2.喻指事情遇到阻难。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。