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If you have ever been bothered about the head of a thumbtack is too small to control, Thumbtack Assistant can makes it easier to nail drawing pins in the wall. With an embedded magnet in the center, Thumbtack Assistant can adsorb the pin and enlarge the force area of the pin’s head.
the school of computer science and technology
Pengfei Zhu Hongyue Guan Ying Kong Yiming Wang