set square

名词 n.
中文释义

英文释义

名词 n.
  1. A flat triangular piece of plastic or other material, having corners of precise angles, used in technical drawing UK
    — Descartes extended this classification by introducing his set-square compass. This is mechanism of sliding set squares that "push" each other... .
  2. A right angle tool used to determine if two surfaces join at a 90-degree angle, composed of two arms, usually made from metal.

词形变化

set squares plural
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