幼龄材与成熟材
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juvenile wood and mature wood 幼龄材与成熟材
juvenile and mature wood
幼木和成熟木
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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.
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；
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