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Perfect Pin / Pin

Perfect Pin
Perfect Pin

Its barycenter offset slopes itself easily,which greatly overcome the shorts of the traditional pins that their needles always turn upward when falling down.It could be used by only one hand.Also, the structure of Its sticking up on both sides is absolutely of great convenience.

University

University of South China

University of South China
Hengyang City of Hunan Province, China

Huang Peijin,
University of South China

Dai Huiling,
University of South China

Pan Siyu,
University of South China

Zhou Jun,
University of South China