切孔 cutting opening

线切割起始孔 Wire EDM Start Hole

孔切斯基 Konchesky ; Paul Konchesky

切牙孔 [解剖] incisive foramina

切分孔型 slitting pass

切向孔 tangential hole

冲孔剪切机 punch and shears

切深孔型 knifing pass

切向孔道 tangential channel

双端横切及钻孔机 Double-End Trim and Boring Machine