三等分角器是属于教学用的教具。
An Angle trisecting unit belongs to teaching AIDS for teaching.
本实用新型就是提供一种不用圆规、直尺可直接将角度三等分的三等分角器。
The utility model provides an Angle trisecting unit capable of directly trisecting an Angle without compasses and rulers.
本实用新型就是提供一种不用圆规、直尺可直接将角度三等分的三等分角器。
The utility model provides an Angle trisecting unit capable of directly trisecting an Angle without compasses and rulers.
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