... 5.Welcome to our shipyard Qing Zhou Yong Sheng Dredging Machinery CO.,LTD1.hydraulic cutter suction dredge2.Max dredging depth 8m, ... Product well ,At a high point Qingzhou Yongsheng Sand-digging Machinery Co., Ltd. established in 1990, Over years of development, the company ... 90days 4. Small Sand Dredge from Qingzhou Yongsheng digging Machinery Co., Ltd, more details pls see the pictures below IF YOU ...