Although the hand -piping gourd and the electric gourd are different in terms of work and use, they will be slippery as a lifting tool. After slipping, the staff needs to solve the maintenance, and first of all, the fundamental reason is found. The thinning of the friction piece will make the hand -stretching of the hand slippery. The friction film is one of the important components in the brake. If the brake is the heart of the gourd in the hand, then the friction tablet is also the core component of the hand pour gourd. For a long time, the friction films will become thinner, which will cause the hand to slide the gourd. We need to regularly do cleaning and maintenance for the friction tablet, and replace the damaged friction tablets in time. The lack of springs on the paw can make the hand sliding the handicap. Sleeping the spring will cause the hand to stract the gourd to brake the fault, and indirectly causes the hand to stract the gourd to slip. In this regard, we need to replace the spring that needs to be scrapped in time. In addition, the cleansing of the hand stubs is not in place, resulting in oil stains on the surface of the brake, which will also cause the hand to slide the gourd.