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Gravel is widely used in power plant transformer undercushion, water treatment filter material cushion, public building, villa, courtyard, garden pavement, river embankment, lake bottom, chemical plant, sewage plant, steel plant, water works, etc. It is the best material choice for water purification, sewage treatment, electricity, garden and other projects to provide quality materials. Also for ceramics, precision casting, paper, spray grinding, chemical, monocrystalline silicon, defense and other raw materials.