The rubber-tyred container gantry cranes(RTG)developed and manufactured by DHHI are applicable to the handling of international standard containers and characterized by advanced performance, good mobility and less sensitivity to ground unflatness. The cranes are powered by diesel engine, with a rated lifting capacity of 40t/50t, span 5-8 containers in width plus 1 driveway, lifting height 4-6 containers in height, applicable to container size 20’、40’、45’.