Portal crane is rigid double link structure, with the advantage of wide luffing and high speed, can lifting and slewing with load in the horizontal. Hositing, slewing, luffing can be operated individually or jointly. This crane can be fitted with grab, hook, spreader to load or unload the different cargo. When container be operated, it can keep container center of gravity in the process of the whole range of horizontal displacement, facilitate container in and out of the container ship grille guides and stacking operation, swinging, sling has the ability of reverse synchronous rotation, to ensure that container longitudinal axis is parallel to the crane rail. Facilitate container counterpoint, can effectively improve the efficiency of loading and unloading of containers.
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