The dangerous source of the hand pour gourds is: the hook, the lifting chain, and the rotating part are not flexible; the brake (self -locking mechanism) fails; the sprocketing cover of the handbuku is missing, the bracelet is damaged; The heavy objects exceeded the rated load of the handbuk gourd; the handle gourd was removed and the hook was used; the weight of the choice of the lifting point and the hanging object was unreasonable; Binding is not firm and reliable; use other power operations other than manpower when hanging; stand on the hanging object for a hanging operation or stand in the direction of the chain back to the direction of the chain; Among them, when the heavy object is temporarily hovering, the bracelet is not tied to the lifting chain; walking under the hanging heavy object or doing other tasks; when the tilt or horizontal use, there is no adjustment of the zipper direction to conform to the direction of the link, the zipper, the zipper, the zipper, the zipper, the zipper, and the zipper. Extension or card chain; When using multiple hand -pour gourds at the same time to hang a heavy object at the same time, it is not reasonable to choose a heavy object to choose a heavy object for each hand. The weight is unclear; the cable -catching hanging object; the binding crane is not firm or unbalanced; the heavy objects and corners and the wire rope are not added with a cushion.