rough machining的用法和樣例：
例句
- The rough machining always has to take most of the processing time in the NC machining.
摘要在數控加工過程中，粗加工往往要佔去大部分的加工時間。 - The model is tested by a typical die-cavity roughing, and shortening machining time and balancing cutting-load can be attained.
通過典型模具型腔的粗加工試驗驗證，證明該進給率優化策略不僅可以縮短加工時間，而且可以使加工載荷均勻。
