river digging machine,small sand digging machine,dredging vessel,dredging machine.river digging machinery,sand digging dredger. 1. river digging machineThe dredger we produce is self-propelled or non self-propelled,portable cutter suction dredger. The hull uses dismantle and box-like structure, which equipped with horizontal shifting devices, cutter ladder lifting devices, spud devices, deck ...