常见例句This article introduces the design and work principle of NC back spotfacer. 介紹了一種數控反鍃刀具的設計及其工作原理。This article mainly introduces the design and work principle of a new back spotfacer. 著重介紹了一種新型反曏鍃孔刀具的設計及工作原理。 返回 spotfacer