The filtering mesh or supplementary filtering mesh can be formed by common filtration fabric, but preferably formed by an activated charcoal filtering layer or biological film filtering layer.
过滤网或附加过滤网，可以是普通过滤布形成，但最好是由活性炭过滤层形成或生物膜过滤层形成。
The filtering mesh or supplementary filtering mesh can be formed by common filtration fabric, but preferably formed by an activated charcoal filtering layer or biological film filtering layer.
过滤网或附加过滤网，可以是普通过滤布形成，但最好是由活性炭过滤层形成或生物膜过滤层形成。
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