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The Water Ruler / The Water Ruler

The Water Ruler

This is a ruler with water inside. Based on the theory of the balance of liquid surface, the ruler can always help to draw accurate angles or to measure angles accurately, and it is very easy and directly to use.

University

Southwest Jiaotong University

Southwest Jiaotong University
Department of Industrial Design
Chengdu, China

Shen Lihua,
Southwest Jiaotong University

Qiu Liwei,
Southwest Jiaotong University

Su Dan,
Southwest Jiaotong University

Shi Xiaoming,
Southwest Jiaotong University