In some lifting operations, lifting equipment itself is no doubt the most important, no other lifting equipment are empty , except for lifting equipment lifting equipment is less important operator , the 25 ton Electric Chain Hoist operator and professional degree many aspects of responsibility , etc. can also cause accidents, we analyze together : 1 , without a permit to operate the machine without permission , ignore the warning signs , signals, wrong operation of the machine . 2 , unauthorized demolition , alteration safety device , install the device causing the failure . 3 , instead of secretly hand tools to operate the 25 ton electric chain hoist . 4 , the temporary use of safety devices is not solid or no equipment . 5 , unauthorized unauthorized venture into dangerous places . 6 , in operation climbing , sitting machine unsafe location. 7, requires the use of personal protective equipment when not ignored ( eg , goggles, face shields, safety hat , etc. )