What is the difference between the red and yellow keys of the special Changheng anti theft door?

Let the worker use the A key, after the decoration is completed, use the B key "waste A key", after the B key is lost or broken, use the C key to open the door "waste B key", and then change the lock core.

During the renovation period, the decoration key has been used, and the door key is not used first, and it is locked with tongue reeds. Once the decoration is completed and there is no need to be in the acceptance, you can discard the decoration key, use a new unopened key, and the decoration key will not open the door.

I bought more than you, it's useless, people are in the rivers and lakes, life can't help themselves, Song Jiang is a Ming kill in the Water Margin, and now this society is popular assassination, Hubei Province, Laohekou City, no one closes, use poison, crematorium business is too good, in 2016, you can hear the sound of firecrackers every 3 days, that is, there are too many red envelopes ...... the locksmith

Fire door: generally refers to the middle of the entrance door is filled with fireproof appliances, fire performance is better, anti-theft door: refers to the anti-theft performance is better, fire and anti-theft is the above two. >>>More

At present, according to the "Mechanical Anti-theft Lock" standard issued by the public security department in 2015, the anti-theft door is divided into three levels, A-level lock, B-level lock, and C-level lock, and the anti-theft performance from A-level to C-level is getting higher and higher. The differences between Class A, B, and C keys are as follows: >>>More