zone punch

短语

[计] 顶部穿孔; 三行区穿孔

词形变化

zone punches 复数 zone punches

释义与例句

n.
  1. 1.

    A hole punched (normally in the top two or three positions) of a punched card in addition to another in order to designate a different (sometimes related) character or to add a plus or minus sign

    计算机 工程 数学