It is a device that is used to lift and move heavy cargo and it can move very heavy objects with low force. This device has mechanical and electrical equipment. Includes: lifting mechanisms, steel wire ropes, winch, pulleys, hooks, steel structures, various braking systems, other electrical components or hydraulic system components. With these components, it can move production materials or heavy devices up and down and on a horizontal rotating surface. It is used in workshops for unloading and loading.
What is very important is that if the cranes are not properly inspected and serviced properly, statistics have already shown what fatalities and accidents occur annually for both hoists and people in the workshops and it endangers the lives of thousands of people.
Most hoists with a voltage of 380 V, three-phase 60-50 frequencies are made in safety factors of 4.5, 5, 6 and 9, each of which has a safety label installed on the steel frame and hook.
Bulgaria 
Ordinary type Kamiuchi 