machining by repeated impact

例句：

1. 1. The machine is capable of machining a variety of parts.
   这台机器能够加工各种零件。
2. 2. The engineer was skilledin machining complex machinery.
   这位工程师擅长于加工复杂的机械设备。
3. 3. Machining is an essentialprocess in the manufacturing industry.
   机加工是制造业中至关重要的工艺。