Seven 76 meter "U-shaped" main arms, with a standard balance weight of 31 tons and an optional 40 tons, can carry up to 31 tons of balance weight and save users on trailer transportation costs. The chassis of the five axle high load-bearing truck crane is equipped with three axle drive and three axle steering, with strong power and flexible maneuverability. The appearance details of the seven items are newly designed, shaping the high-end quality of the top crane.