punching

动词 punch:

1. deliver a quick blow to
   同义词：punch, plug
2. drive forcibly as if by a punch
   同义词：punch
3. make a hole into or between, as for ease of separation
   同义词：punch, perforate

1. They cut holes on the sheet of metal with a punch press.
   他们用冲床在金属板上打孔。
2. Small pieces of paper or cardboard generated by punching holes in paper tape or data cards.
   孔屑在纸带或数据卡片上打孔所产生的小纸屑或硬纸片