Sign up for
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
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.
Chengdu University of Technology