n.拳打
動(dòng)詞punch的現(xiàn)在分詞形式.
They cut holes on the sheet of metal with a punch press. 他們用沖床在金屬板上打孔。
Small pieces of paper or cardboard generated by punching holes in paper tape or data cards. 孔屑在紙帶或數(shù)據(jù)卡片上打孔所產(chǎn)生的小紙屑或硬紙片
