... strength of timber 木材强度 strength parallel to grain 顺纹强度 strength parameter (材料)强度参数 ...
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在物理力学性质指标中成熟材的基本密度、气干密度、顺纹抗压强度、抗弯强度、抗弯弹性模量及冲击韧性高于幼龄材；
In physical and mechanical indexes, the basic density, air-dried density, compression strength parallel to grain, MOR, MOE and toughness of mature wood are higher than that of juvenile wood.
顺纹抗拉强度主要受管胞长度、管胞强度、纤丝角度、结晶度等因子的控制。
Tensile strength is mainly controlled by tracheid length, tracheid strength, microfibril angle and crystalline degree etc.
材料和工艺相同时，顺纹组坯时的胶合强度高于垂直纹理组坯时的胶合强度。
With same material and technics, bond strength of parallel lay-up is higher than upright lay-up.
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