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Through a simple morphological structure change to redesign pin, we give the pin more features while keeping its use structure and intensity .In view of the man-machine engineering, the new structure is more suitable to press by hand. Each pin with magnetic avoid causing damage human body by mutual combination.
Xiaowei Wu，Caixiang Ding，Rufeng Dai，Ziyun Yan，Dunqi Lu，Wenjie Zhang，Dawei Pan，Huanghao Jin，Qionglei Zhu