n.粗加工；草擬
動詞rough的現(xiàn)在分詞形式.
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(yōu)化策略不僅可以縮短加工時間，而且可以使加工載荷均勻。
