a machine that is use to extract sand | windtechnic
· Sand Gravel Dredging Pump - Sand Pump Machine, Gravel Pump. Sand gravel dredging pump is mainly used for extracting and transporting large particles whose diameter is too big to be pumped by general sand pump machine.The overflow parts of this kind of sand gravel dredging pump are made of hard nickel and high chromium wear resistant alloy.