1: Travel switch: Many friends say how old my switch is going to be bad! I don't know if you find that there is no switch that is often bad. There is a spring in the switch that has definitely broken. That kind of spring repair shop can't buy it, in fact, those springs are easy to find. Look for a bad trip switch to remove, there is a spring inside, put it in normally.
2: The number of rotations: Every time the mechanic is basically a mechanic, the number of rotations will be completely replaced. Many friends think that the number of rotations that have been replaced is basically useless. In fact, these are all big mistakes. Teach a friend to deal with those rotations, clean them in petrol, and then soak them in diesel for a few days. After a while, you are looking at those rotations. Basically, the gaps are very small and can be used normally. (But those rotations should only last for one month)

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