rough machining的用法和样例：
例句
- The rough machining always has to take most of the processing time in the NC machining.
摘要在数控加工过程中，粗加工往往要占去大部分的加工时间。 - The model is tested by a typical die-cavity roughing, and shortening machining time and balancing cutting-load can be attained.
通过典型模具型腔的粗加工试验验证，证明该进给率优化策略不仅可以缩短加工时间，而且可以使加工载荷均匀。
