What if the key is inserted in the hole and can not be drawn out?
This is not a simple question, to the dorm there, there will be someone to help you repair
The end of the pencil is made of graphite, and the graphite powder can be used as lubricant for the machine running under high temperature, and the pencil core can be made. Add some pencil powder to the keyhole. Try to lubricate the inside of the keyhole. Try it!
Don't use the strength to Jin qiao. You can also pour cold water into the hole. It's very useful
