filtering bed

См. также в других словарях:

• filtering mat — a grating screen of fish screen (2) (q.v.) built on a slant into a river bed. Fences or netting direct fish onto the screen and the fish run aground on it while the water falls through the screen grating …   Dictionary of ichthyology

• filter bed — noun Date: circa 1874 a sand or gravel bed for filtering water or sewage …   New Collegiate Dictionary

• filter bed — noun a tank or pond containing a layer of sand or gravel, used for filtering large quantities of liquid …   English new terms dictionary

• filter bed — noun filter consisting of a layer of sand or gravel for filtering water • Hypernyms: ↑filter …   Useful english dictionary

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