... manipulator is mainly composed of trolley, column, boom, the guidance place, column revolving structure, boom lifting structure, ... structure, etc. Detailed characteristic as follows:l Column and boom is rectangular-beam,with double track. ... a lifting eye on the top of the column.ModelHeavy-DutyMiddle-DutyLight-DutyHeavy-DutyMiddle-DutyLight-DutySpecificationYJ6070YJ4050YJ2030YJ5060YJ3040YJ1015Lifting ...