Qingzhou Duo Lida Heavy Machinery Co., Ltd. (former Qingzhou Li Feng placer Machinery Factory) is one domestic enterprise which produced dredging equipment, placer machinery, mining machinery, mineral processing equipment and cement automation equipment. Company's main products of dredging ship, gold panning ship, construction waste crushing plant, iron powder ship, sand dredger, crusher, sand making machine, sand washing machine and other equipments are widely used in the areas of port and river dredging, riverbed mining, construction waste disposal, mining, and selection of a...