1. Cutting down trees will be banned in regions along the upper reaches of the Yangtze River and the upper and middle reaches of the Yellow River, with timber output reduced by about 20 million cubic metres. 
   长江上游，黄河中上游将禁止砍伐树木，从而木材产量将减少2000万立方米。
2. bevel gear cutting tool 
   锥齿轮加工刀具
3. Chapter Five Forest Cutting 
   　　　　　　　　　　　第五章　森林采伐
4. theory of metal cutting 
   金属切削原理
5. thread cutting and rolling 
   螺纹加工

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• 1. 中部掏槽
  中段原木 middle cutting...中部掏槽 middle dampness...[医]中湿 middle dantian
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