Double 40ft double trolley container crane is the combination of advantages of double 40ft container crane and double trolley container crane. It is the world most effective crane.  ZPMC created double 40ft double trolley container crane (refer to the following photo) can handle 80~100 units of 40ft containers per hour theoretically. It is the world fastest crane. 

Its structure and handling mode is similar to the double trolley container crane. It is also composed of main trolley, transmit platform and aft trolley.