It can also be called differential hoist. The most important feature is that the lifted load can stand in the desired position without any force and the force required to lift the load is low. The fault is the prolongation of the lifting time of the load, that is, it is lost from the road. It consists of two fixed and one movable free pulley, concentric and rotating together. They are widely used in small workshops and businesses due to their easy maintenance and small dimensions.

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