When a cylinder fails, it can work single cylinder for a while.Manufactured in range of 1 cbm to 50 cbm capacity. The deployment of hydraulics in the design saves cycle time, wear and tear on the crane, making it both faster to use and economically to own. It won’t be influenced by the bad environment such as high temperature, extreme coldness, powder and rain, etc. It is a merging of the radio remote control technology into the single rope grab for handling of bulk materials.