... drive, CR parallel to the belt drive, ZVZ top and bottom belt drive, CV and other types of ... under the allow pressure (3.6MPa). Qingzhou Yuanhua Machinery Manufacture Co., Ltd. We specialize in dredgers for various industries: Construction, Environmental ... such as : cutter suction dredger , bucket chain dredger , underwater pump dredger , self- propelled dredger , gold panning dredger , iron extracting ...