名词计算尺
1. Before the 1970s the slide rule, or slipstick, was as common as the typewriter or the mimeograph machine.
1970年代之前，计算尺跟打字机和油印机一样，随处可见。
noun
1. analog computer consisting of a handheld instrument used for rapid calculations
have been replaced by pocket calculators
Synonym: slide rule