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绘图笔 / drawing pen


Hand-drawn graphic is a kind of necessary skills for engineers, even though lots of people make graphic by computer. However, it might meet some problems when engineers do that by a normal pen. For example, even the experienced engineers would feel difficult to control the space in the same size to meet the professional drawing standards.


Nanchang University

Nanchang University
NanChang, China

heqi zhao,
Nanchang university

weitong sun

xiaodong li

yuan shu

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