tree-stem theory 树干理论
elongation of tree stem 高生长
chulan tree stem and leaf 珠兰
tree stem form 树干形质
tree stem impedance 树体干部阻抗
tree stem capacitance 树体干部电容
tree stem surface area 树干表面积
the base of tree stem 树干基部
gravity center of tree stem 原条重心
Stem clothes tree 树枝衣架
The variation of the three wood characters in perpendicular direction could not make great influence on vertical utilization rate of tree stem.
三个性状在垂直方向的变异对树干纵向利用率不会产生很大的影响。
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