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Leverage - Thumbtack / Thumbtack

Leverage - Thumbtack

Give me a fulcrum to pry one earth!The pushpin to improve not only more convenient for users to pull pushpin, but also can be used for hanging things.


Chen, Jianping

Chen, Jianping
Zhengzhou City, Henan Province, China


Zhongyuan University of Technology

Zhongyuan University of Technology
Zhengzhou City, Henan Province, China