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Concave locks / Product improvement

Concave locks

The darkness often can not find the keyhole, opened the door in order to be confused rush
The concave design keyhole lead key accurate slide into the keyhole, not open the door
Lengthening the internal security bolt, does not weaken the anti-theft effect.


Chienkuo Technology University

Chienkuo Technology University
Changhua City, Taiwan


Weng, Huei-Xin

Weng, Huei-Xin
Taichung City, Taiwan