dockside travelling crane

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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
ship construction — Introduction complex of activities concerned with the design and fabrication of all marine vehicles (ship). Ship construction today is a complicated compound of art and science. In the great days of sail, vessels were designed and… … Universalium

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