The boom is made up with single boom or four linked bars. The whole machine is light, with low wheel pressure. Its luffing system adopts steel wire luffing. It can luff with load, and move horizontally. This model has four working mechanisms, which are lifting, slewing, luffing and traveling. It can work both independently and collaboratively. The linkage among all mechanisms greatly improves the equipment’s productivity. It moves stably, is save and reliable, the ideal equipment for shipbuilding factory assembly. The company uses its rich experience, exquisite techniques and reliable technologies during designing, manufacturing and installation, assuring the product will be able to run safely, reliably and smoothly under all normal working conditions.