1.china cutter suction dredger 2.SGS testing factory 3.china sea sand dredger,sea dredge, sand dredge, cutter suction dredge 1. Description china cutter suction dredgerQingzhou Haiyang Ore Machinery Manufacturing Co., Ltd. was established in 1992. Over years of development, the company has been the largest production center of cutter suction dredgers, sand mining machinery and gold dredging ...