Double Girder Gantry Crane Rail Mounted Container Gantry ...
9.Double girder gantry crane have A type, U type. U type is designed for container lifting. It could be designed with cantilever or not. 10.The crane with three working class: A5, A6, A7. The main beam, legs and travelling beams are made by steel plates, it is very strong and has small body, it is suitable for ocean transport.
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