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Easily pick up15° / 1.07 Office

Easily pick up15°

When we use plastic set squares and rulers,their smooth surface are the contributing factor when they get clung together with the tables and papers.Which cause us a huge headache when separating the set square and ruler from the tables and papers.This is when having a chamfer angle at the edge of the comes in handy.
After conducting several experiments,we found out that a fifteen chamber angle is the most appropriate angle as shown in the diagram.


Jiangsu Normal University

Jiangsu Normal University
Xuzhou, China

Chenming Zhu,
Jiangsu Normal University

Kaifeng Jiang

Qi Cao

Yaodong Chen