本论文的研究工作主要由以下几个部分展开：首先对比机械采伐和油锯采伐的伐根高度差异性；
The main research contents for the study are as follow:At first, the paper compares the height of stump under machinery operation and manual operation.
本论文的研究工作主要由以下几个部分展开：首先对比机械采伐和油锯采伐的伐根高度差异性；
The main research contents for the study are as follow:At first, the paper compares the height of stump under machinery operation and manual operation.
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