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Cranes: Bottom Slewing Cranes

A crane is a piece of mechanical equipment that uses pulleys, winches, and ropes, cables or chains to lift an object. Bottom slewing cranes are crane in which the boom and winch are mounted to a plate that is capable of rotating in order to move a load from one location to another. The slewing device can be mounted to the deck plate for a stationary crane or above the tracks on a mobile crane.