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45° RULER / 45° RULER


When drawing a line,we will keep the pen close to the ruler subconsciously in order to get a straight line. but it will leave some ink on the surface of the ruler and it will dirty our hands when we catch it.Furthermore, it will do harm to our health if we ignore it. in addition, when we need to move the ruler, it is hard for us to pick it up.


Guangdong Ocean University

Guangdong Ocean University
Zhanjiang, China

Xiaobin Li,
Guangdong Ocean University

Runheng Dai ,
Guangdong Ocean University

Jiaqing Wu,
Guangdong Ocean University

Minyou Zhong,
Guangdong Ocean University