filter bed

English

Filter beds at Kempton Waterworks, on the edge of Greater London (view from the A316 viaduct)

A filter bed at Benfleet Sewage Treatment Plant, Essex

filter bed (plural filter beds)

A layer of gravel, sand or other material through which liquid is passed in order to remove impurities.

“filter bed” (US) / “filter bed” (UK) in Oxford Dictionaries, Oxford University Press.

单词	filter bed
释义	filter bed English Filter beds at Kempton Waterworks, on the edge of Greater London (view from the A316 viaduct) A filter bed at Benfleet Sewage Treatment Plant, Essex Noun filter bed (plural filter beds) A layer of gravel, sand or other material through which liquid is passed in order to remove impurities. References “filter bed” (US) / “filter bed” (UK) in Oxford Dictionaries, Oxford University Press.
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