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Trudle Ruler / Tools

Trudle Ruler
Trudle Ruler

This is designed to innovate a traditional way; the method used measures with combination off wheel and ruler. By rolling the body of wheel, the mechanical transmission of the perimeter precisely calculated and shown on the screen. Being both multifunctional it is easy to calculate and measure both flat and curved surfaces


Dalian Nationalities University

Dalian Nationalities University
Dalian, China

Xue-fei Liu
Di Fang


Dalian Nationalities University

Dalian Nationalities University
Dlian City, Liaoning Provice, China

Jing-hao Ren Jin-jin Wang Yan Piao