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Filter using a special long fiber, deep filter structure, made by high-density high-pressure treatment, characterized by a high filtration precision 1. (not less than NAS6 level) 2. High filtration efficiency, speed, capacity sewage quantity 3. trap amount of pollutants, dirt holding capacity of more than 4 to remove water has a strong, long-absorption capacity 5. cycle, low cost, easy operation 6. Replace cheap price, simple operation, easy