孔屑在纸带或数据卡片上打孔所产生的小纸屑或硬纸片 Small pieces of paper or cardboard generated by punching holes in paper tape or data cards.
信尾信封背面可拆掉的附加部分，其上有打孔的边缘和特定的市场信息或订购单 A detachable extension to the back of an envelope, having a perforated edge and special marketing information or an order form on it.
他们用冲床在金属板上打孔。 They cut holes on the sheet of metal with a punch press.
售票员用剪票夹在他的汽车票上打孔。 The conductor punched his bus ticket.
