... variety including 50—800m3/h large scale dredging and sand mining equipments (which includes hydraulic cutter suction type, ... , iron extracting dredger, iron extracting equipments, sand sieving machines, crusher, weathering sand producing lines(break, rinsing and separating). All ... marine pump suction functioned by the fluid power of sand pump, enters sand pump, meanwhile, get some energy,at last, ...