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More media filter device is using a or several filter media, in must of pressure Xia put turbidity high of water through must thickness of granular or non-grain material, to effective of removed suspended impurities makes water clarified of process, common of filter material has quartz sand, anthracite, manganese sand,, main for water treatment except cloud, softening water, water of Qian level pretreatment,, water turbidity can up 3 degrees following.