... magnet roller type) one setSize3000*900mm (water-washing precise selection type) Antimagnetic angle 120°Selection Modedownstream type/forward flow ... by diesel engine - wastes being dumped through chuteFeature:Large output, less investment, high efficiency, easy operation, ... series products , such as : cutter suction dredger , bucket chain dredger , underwater pump dredger , self- propelled dredger , ...