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Precision control compass / Office Supplies

Precision control compass

This bow compass can display the radius intelligently and adjust the distance accurately. You can change the radius in millimeters by switching the top button towards to the right. Not only can it adjust the distance easier, but also show you the totally radius intelligently to manage the whole distance.

University

Zhongkai University of Agriculture and Engineering

Zhongkai University of Agriculture and Engineering
Guangzhou, China

Wanlin Xiao,
Zhongkai University of Agriculture and Engineering