Shipbulding gantry crane primary metal structure is mainly composed of main beam, rigid legs and flexible legs.Compared with the traditional portal crane, shipbuilding gantry crane has obvious advantages on segment installation of ship hull and transportation. Except loading and unloading function, shipbuilding gantry crane also implement the turning of ship hull through the coordination of the upper-trolley and lower-trolley to mount hull in its exactly position.

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