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The lock cylinder fork of the anti-theft door has fallen off or the fork is broken. It is recommended that you find your local lockpicking company to help you fix it. In the Zou Cheng area, you can call 0537-5999919
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There is a problem with the coordination of the lock cylinder and the lock body, it is recommended to find a master to check the lock.
I think it's the insurance closed, you can open the insurance. Then it will open. You can give it a try.
It is the egg bead spring in the lock that is broken, so it cannot be synchronized with the key notch.
It could be that the spring of the lock cylinder is broken, or something inside the cylinder is stuck. >>>More
Maybe the lock cylinder is broken, you try it first, put some pencil powder into it, don't use oil, the lock breaks quickly with oil. If you still can't screw it, find someone to change the lock cylinder.
While pulling hard, I think it will work.