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Branch Ruler / Ruler

Branch Ruler
Branch Ruler

A simple modification makes this ruler have become so special. The only difference is that it has a lot of small holes, because of these holes, we can have three different functions which are frequently-used in working. they are ruler, compass and protractor.

University

Zhejiang University

Zhejiang University
Hangzhou, China

Design

Zhejiang University

Zhejiang University
Hangzhou, China

Zhang/Cheng Bingzhi/Zhu Ling`en/Wang QIchong/Wei