hob sharpening machine

例句：

1. 1.This hob sharpening machine is very useful for cleaning the metal parts.
   这个大头锤磨光机对于清理金属部件非常有用。
2. 2. The old man uses this hob sharpening machine to sharpen his tools every day.
   这位老人每天使用这个大头锤磨光机来磨利他的工具。
3. 3. The engineer carefully selected the right hob sharpening machine for the job.
   工程师仔细挑选了适合这项工作的合适的大头锤磨光机。