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pull easilly / thumbtack

pull easilly
pull easilly

The traditional thumbtack is a classical design which makes our life convenient but also has disadvantage.Such as it is difficult to pull out even use a tool and we always broke it.This new thumbtack is an improvement of the traditional design.After removing a part of material of the traditional thunbtack,more space id supplied to you to pull it out easier.This pattern also has the other advantage which can reduce the use of iron.

University

Shaanxi University of Science

Shaanxi University of Science
xi'an, China

Design

Shaanxi University of Science

Shaanxi University of Science
xi'an, China

Xin Jin Shixiao Li Chao Ren Diguan Feng