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LH-Double Girder Electric Overhead Crane is bridge crane with hook, suitable for indoor or outdoor fixed cross inter-cropping handling and transport work. Lifting capacity range 3T-50T, and it consisted with double girder bridge mechanism, traveling mechanism, trolley with frame and electrical parts and The lifting mechanism is equipped with CD/MD electric hoist with frame. Compared to single girder overhead crane, its structure is stronger, more secure use, so double girder overhead crane l