hoist travelling trolley

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• Crane (machine) — A modern crawler type derrick crane with outriggers. The latticed boom is fitted with a jib. A crane is a type of machine, generally equipped with a hoist, wire ropes or chains, and sheaves, that can be used both to lift and lower material …   Wikipedia

• Gantry crane — Both overhead travelling cranes and gantry cranes are types of crane which lift objects by a hoist which is fitted in a trolley and can move horizontally on a rail or pair of rails fitted under a beam. An overhead travelling crane , also known as …   Wikipedia