punching

n. 拳打(动名词作名词用,不可数)

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

They cut holes on the sheet of metal with a punch press.

他们用冲床在金属板上打孔。