to prevent cave- hook .

Lifting operations may not have the slightest error , work positioners lifting heavy objects should be hanging slightly off the ground interview , when the weight has been linked to the prison to confirm the reliability and stability of the crane brakes are good , and then continue lifting, in order to detect and eliminate insecurity. In the process of weight lifted , the operator should put his foot on the brake pedal , electric walkie pallet jack pay close attention to lifting heavy objects , to prevent cave- hook .