Qingzhou Weier Environmental Protection Machinery Manufacturing co., LTD. was ablished in the 1990s.  Our company is a professional manufacturer and reliable service provider of dredging machines, water cleaning harvesters, mining machinery and sand processing machinery. We provide a series of services from Research & Design, Production, Installation & Adjustment to After Service. We specialize in dredgers for various industries, including: Construction, Environment, Sand Production and Mining. Our main products include sand-digging machinery, mineral processing machinery, sand washing machines, sand pumping ships, auto-load and auto-unload sand transporting ships, iron extraction machinery (water election, dry election), gold mining ships, high-standard sand washing machinery, sand making machinery, transport ships, stone crushing machinery, large and More