1. Vibration.
When the screw is rusty, it is not allowed to be forcibly removed with a wrench. Tap the screw with a wrench, break the sundries in the rusty position, turn the screw left and right with the wrench, and then you can remove the screw. Was dismantled.
2. Fire.
If the screw is seriously rusty, you can use electric welding to oxidize the screw, burn the screw red, and then drop some lubricating oil into the gap of the screw, wait a while, and then remove the screw with a wrench.