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Compasses ruler / ruler

Compasses ruler

To the problem that compasses can not only draw a circle of desired size directly but
also a circle of large size, we designed this product Compasses Rulers, combine the
compass with ruler, you only need to fix one end of the compass, then adjust the scale
on the ruler, you are able to determine the radius of the desired circle. Furthermore,
the maximum of radius is equal to the length of the ruler. The design of the fixed part
of the needle is push-type, it won’t hurt people when unused.

University

Jiangnan University

Jiangnan University
Wuxi, China

Design

Jiangnan University

Jiangnan University
Wuxi, China

Wenmei Zhang Suhao Di Xin Liu Simin Gan