The aluminum alloy hand holds the gourd also needs to be maintained. Before using the operating hand to pull the gourd, check whether the appearance of the hand to pull the gourd is damaged, deformed, etc., and the crane chain is damaged and cannot be used. When using the hand to pull the gourd, do not extend your hand to pull it at will. This is because the weight of the gourd in the hand is limited. If the extended hand pulls the hand pull, it will cause the hand to pull the gourd overload and damage the parts. When operating the gourd, pay attention to the cleaning and lubrication of the interior and lifting chain of the body to prevent the miscellaneous objects from entering the body. Pay attention to whether the clue stress direction and the hand pulling gourd hook contact is reliable. When the handle is pulled, if the gourd is hindered, the handle of the handle should be stopped immediately to avoid damaging the equipment.