set square

美 
英 
  • n.三角板;三角尺
  • 网络三角板组;直尺;三角板斜角规
复数:set squares  
set square
n.
1.
三角板;三角尺an instrument for drawing straight lines and angles, made from a flat piece of plastic or metal in the shape of a triangle with one angle of 90˚

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