The filter bed is rinsed with the feed liquor for 3.5 min.
冲洗3.5min,纳污滤层即可复原.
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Backwashing is one of the Methods: To maintain a filter bed clean.
反冲洗是保持滤床清洁的方法之一.
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The filter film plays an important role in water purification in well with natural filter bed.
滤膜在天然滤床渗流井滤净水中具有重要作用.
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