... Sand Dredger Vibrating Screen and Roller Screen Magnetic Separation Equipments include Magnetic Separator(one or two ) ModelHull ... dredger , gold panning dredger , iron extracting dredger, iron extracting equipments , sand sieving machines, crusher , weathering sand producing lines (break ... for land and watercourse mining of rare metals.Own professional R&D department , CAD drawing design center , ...