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Multi-purpose ruler / ruler

Multi-purpose ruler

The ruler is commonly used in study and work, and the function of the ruler is relatively simple. The design of this ruler is functionally extended. The ruler and the angle of the protractor are combined into one, so that the function is extended, easy to use, and convenient. When we merge the rulers when drawing a straight line, when we need to draw an angle, open the ruler and slide it to the required angle, and the angle will be displayed on the cylindrical display.

University

Jiang Xi Normal University

Jiang Xi Normal University
Nanchang, China

Xinggui Cheng,
Jiang Xi Normal University

Xinying Deng,
Jiang Xi Normal University

Shaojun Wang,
Jiang Xi Normal University

Zilong Wang,
Jiang Xi Normal University