knock-boring machine

例句：

1. 1. The hammer is used to strikemetal.
   锤子用来敲打金属。
2. 2. Thechisel is used toshape wood.
   凿子用来雕刻木头。
3. 3. The hammer and chisel areessential tools for carpentry.
   锤子和凿子是木工的必备工具。