When using explosion -proof electric gourds, carefully check the instructions and precautions. The hook is not allowed to be crooked and the horizontal drag is used. After use, the total switch of the power supply should be opened to cut off the main power supply. The square box of the Limited Limator is a safety equipment set up when the hook rises and decreases beyond the extreme orientation, so the limiter cannot be used as a switch. Explosion -proof electric gourds should be operated by special persons, and operators must master operating procedures for explosion -proof safety. Dedicated personnel should be checked once every ten days, and the explosion -proof electric gourds should be checked once.