1. Always keep the surface of the machine body clean, and regularly check whether the internal structure is intact, so that the pinion in the rocker is flexible and reliable and the lifting sleeve can rise and fall freely.
2. The friction surface between the lifting sleeve and the housing must be oiled at any time, and other oil filling holes should be regularly lubricated.
3. In order to take into account the safety in use, avoid overloading and working with illness, and it is not suitable to use multiple units to avoid danger.
