thinning machine

例句：

1. 1. The thinning machine is used to remove the outer layer of bark from trees.
   这个剥皮机用来去除树的外层树皮。
2. 2.The thinning machine is an essential tool for forestry workers.
   这个剥皮机是林业工人必备的工具。
3. 3. The thinning machine can be used to reduce the weight and size of materials, such as paper or wood.
   这个剥皮机可以用来减少材料的重量和尺寸，比如纸张或木材。