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Any Angle / teaching ruler

Any Angle
Any Angle

Any Angle is a teaching ruler with a protractor half filled with fluid, which helps teachers to draw lines of any specific angles accurately and conveniently. It employs the capability of liquid that can show the horizontal line all the time.

Teachers no longer need to draw geometry awkwardly and worry about the errors.It can achieve the same function as a whole ruler set but saves much material in the production.

University

Zhejiang University

Zhejiang University
Hangzhou, China

Jun Hu,
Zhejiang University