... heavy duty electric hoist 1- Model: CD1/ MD1 2- Lifting Capacity: 1- 20t 3- Lifting Height: 3- 40m 4- Stationary type heavy duty electric ... , bridge crane, portal crane and hanger crane. It is often used in factories, mines, docks, ports, storage houses, workshops etc., ... machinery to raise labor productivity and improve working conditions. The lifting speed of CD1 type is general speed, it can satisfy ...