常见例句This article introduces the design and work principle of NC back spotfacer. 介绍了一种数控反锪刀具的设计及其工作原理。This article mainly introduces the design and work principle of a new back spotfacer. 着重介绍了一种新型反向锪孔刀具的设计及工作原理。 返回 spotfacer