N a stiff strip of wood or metal that has one edge straight and true and is used for ruling and testing straight lines 直尺
A number of ancient problems concerning Compass and straightedge constructions were finally solved using Galois theory.
从目前的罗盘和直尺古代建筑的一些问题终于解决了使用伽罗瓦理论。
In this paper, an experiment of test scale of straightedge is introduced by theprinciple of the Moire fringe shift amplifier.
本文介绍利用莫阿条纹位移放大器原理检验直尺刻度实验。
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