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key chain / key chain

key chain

This design just expending a hole can contain the key, that make the process of bunching keys easy. then towed to the entrance.The design of Easy Key Chain can solve that problem.As long as you can put the key into the space ,Are you still worring about how to put the key into the keyhole without using too much strength?

University

Ningbo Institute of Technology,

Ningbo Institute of Technology,
Ningbo ,Zhe Jiang, China

Design

Ningbo Institute of Technology, Zhejiang University

Ningbo Institute of Technology, Zhejiang University
ningbo, China

Yuxiang GAO, Weizhen Zhan, Jianhua Chen