- 階段狀采伐
- step: vi. (-pp-) 1.走；跨步。 2.踩，踏上 (o ...
- fell: n. feel Dr. Fell towards sb. ...
- felling: age; area; cycle; notch; operation; period; point; section; series; with axe; 采伐; 二重接縫; 伐木; 費(fèi)靈; 砍伐; 咬口折縫
- advanced felling: 預(yù)備伐, 前伐
- allocation of felling: 伐木順序
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