集材—50型拖拉机
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skidding tractor 集材拖拉机
skidding-50 tractor 集材型拖拉机
tractor skidding trail 拖拉机集材道
For larch plantations on the gentle slope, the operation efficiency of tractor skidding is better than that of animal skidding.
对于平缓坡的落叶松人工林，拖拉机的集材效率优于畜力的集材效率。
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