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Anonymous users2024-01-24The left side is B-grade, and the right side is super B-grade, so the right side is good.
The lock cylinder of the anti-theft door is divided into A, B and super B levels according to the structure:
A-level: the key is flat, only single-sided single-row bullet slot, the cross key is basically A-level, and it only takes about two or three minutes to open;
Class B: From the key, it is a double-sided double-row bullet slot, even if there are tools, it takes some time for a skilled worker;
Super B level: It is the safest level at present, from the key to the general double-sided double-row bullet slot, there is a blade or curve next to it, its lock cylinder design technical standard is more than 270 minutes.
Spray the keyhole with rust remover! Hardware stores sell a bottle for ten yuan and can be used for a long time.
The lock cylinder is broken! It is recommended to take a few more keys and try to add some vegetable oil to the lock cylinder, but only to change the lock cylinder.
The general security door can be opened by someone on the 800 only pick the lock and then change the lock cylinder for you.
Because there is a transmission mechanism of the lock tongue inside the lock body, when the lock cylinder rotates, the fork in the middle of the lock cylinder will drive the transmission mechanism of the lock tongue, thereby driving the indentation or extension of the lock tongue, the gear is also there, the fork is also there, the function is indeed the same, I don't know if I say this, you understand it.
The lock cylinder should not be all copper, it is recommended to find a master to replace a lock cylinder.