1) juvenile wood
幼龄材;中心木质部
2) PVC fencing forest sheath
幼龄林木
3) juvenile wood
幼龄材
1.
The results shows that, expect for the yield of pulp, juvenile wood of improved plantation have better pulping performance than ripe wood of general plantation on the tearing resistance, bursting strength, tensile strength and brightness.
采用经过多年度多重复选择改良的良种马尾松幼龄材与一般马尾松成熟材进行造纸性能比较研究。
5) heartwood
[英]['hɑ:twud] [美]['hɑrt,wʊd]
赤木质;心材
6) unmature forest
中幼龄林
1.
Summary and exploration of technology and theory on tending unmature forest in Beijing Ciry;
北京市中幼龄林抚育技术和理论的总结与探索
补充资料：幼龄
1.幼年。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条