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You can use the key to open the door first, because if the internal lock core is twisted and stuck, it will not rebound. At this time, you need to add some edible oil or pencil lead powder to the lock core to lubricate it to restore it. If the handle is tight and does not rebound, you can try to twi

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Door handle installation method and matters needing attention Door handle installation method According to the size of the door handle, drill the corresponding installation holes in the door, and open the door during installation to facilitate the operation of the door handles on both sides of the d