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+ compasses / compasses

+ compasses
+ compasses

Every time we use a Normal compasses to draw circle and the paper ( even the next page ) will leave a piercing hole. We can solve this problem When using "+compasses". Normal compasses used its Needle as the center of a circle to draw circle. Opposite “+compasses” Similar to "+" seal instead the needle. Firstly, Paper will not be pierced as a needle hole and the next page will be Intact; Secondly, The center of a circle will symbol as "+" .

University

GuangDong Industry Technical College

GuangDong Industry Technical College
Guangzhou City, Guangdong Province, China

Design

GuangDong Industry Technical College

GuangDong Industry Technical College
Guangzhou City, Guangdong Province, China

Chen Han, Qiu Panpan