perforation gauge

名词 n.
中文释义

英文释义

名词 n.
  1. A device for measuring the number of perforations per 2 centimetre distance along the edge of a postage stamp.
    — The perforation-gauge is surrounded by a neat border, and inscription indicating the price — one shilling — and the publisher's address.

词形变化

perforation gauges plural
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