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An anti-theft lock / Security

An anti-theft lock

An anti-theft lock with three-part of lock cylinder,to improve the anti-theft performance of the lock.You can open this lock for turn the key three times.you should turn the first time to unlock the first part of it.And turn the second time to unlock the second part of it ,and get the key in the third part and turn to open the key completely.

University

成都理工大学

成都理工大学
成都, China

Feiyang Dai,
Chengdu University of Technology