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Rotatable ruler / Ruler

Rotatable ruler
Rotatable ruler

We should draw many long lines when plotting, and in this process,we use some rulers,triangles,tapes and a series of tools to meet the needs of plotting lines,various tools may lead to its lower efficiency, so our team has designed the rotatable ruler which extends unboundedly in the horizontal and vertical direction,and it improves the efficiency of plotting lines greatly.

University

Xiangtan University

Xiangtan University
Xiangtan, China

Chen Xingxu,
Xiangtan University

Luo jian,
Xiangtan University

University

Xiangtan University

Xiangtan University
Xiangtan, China

ChenXingxu ChenXingxu,
Xiangtan University