These may be slicing off thin shavings, countersinking, counterboring, or other operations.

这些可能是切片薄刨花，沉孔，扩孔，或其他操作。

Rotating machining tools ( cutting ), round rods, circular knives circular saws, countersinking tools, turning tips, guide gibs, knive blades.

可转位加工工具（切削） 、圆棒、环刀、圆盘形锯、钻孔工具、车刀、导向槽、刀片。