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Anonymous users2024-01-24It is recommended not to use edible oil, if the concentration of grease is high, it is easy to absorb dust, and it is even more difficult to use after the lock, in many cases, the effect of applying oil to the surface of the lock is not very ideal, and the general lock mechanical parts are removed to apply grease The effect is better, if it is the lock cylinder, it is even more impossible to add oil, the lock core can be added, and the pencil lead is ground powder. Hope it works for you.
If there is a key inside, it can also be opened. The kind you mentioned, there should be one, but it's not easy to find. Because after all, it is not safe, for example, it is more dangerous to put children indoors.
Under normal circumstances, the general security door can be opened as long as there is a key inside or outside. >>>More
Call your friend and ask him if he has a spare key at home.
Since it is an anti-theft door, it must not be, and after the anti-theft door is locked outside, you can only use a key to open it; Or some brands of high-end doors are locked on the outside, and you can't open it if you have a key inside, so you can only open it violently or ask the lock company.
It depends on what kind of security door, some can't be opened, and some can be opened. You'd better take a picture.