filter bottom
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filter-bottom block — noun : a hollow vitrified salt glazed clay block used in the floors of trickling filters in sewage treatment plants … Useful english dictionary
Filter — Fil ter, n. [F. filtre, the same word as feutre felt, LL. filtrum, feltrum, felt, fulled wool, this being used for straining liquors. See {Feuter}.] Any porous substance, as cloth, paper, sand, or charcoal, through which water or other liquid may … The Collaborative International Dictionary of English
Filter bed — Filter Fil ter, n. [F. filtre, the same word as feutre felt, LL. filtrum, feltrum, felt, fulled wool, this being used for straining liquors. See {Feuter}.] Any porous substance, as cloth, paper, sand, or charcoal, through which water or other… … The Collaborative International Dictionary of English
Filter gallery — Filter Fil ter, n. [F. filtre, the same word as feutre felt, LL. filtrum, feltrum, felt, fulled wool, this being used for straining liquors. See {Feuter}.] Any porous substance, as cloth, paper, sand, or charcoal, through which water or other… … The Collaborative International Dictionary of English
filter bed — n. a tank, covered trench, etc. with a sand or gravel bottom, used to filter water, sewage, etc … English World dictionary
Filter (aquarium) — Aquarium filters are critical components of both freshwater and marine aquaria.cite book |last=Riehl |first=Rüdiger. Editor. |coauthors=Baensch, HA |title=Aquarium Atlas |year=1996. 5th Edn. |publisher=Tetra Press |location=Germany |isbn=3 88244… … Wikipedia
Filter feeder — [ left|thumb|200px|Krill feeding under high phytoplankton concentration (slowed down by a factor of 12).] Filter feeders (also known as suspension feeders) are animals that feed by straining suspended matter and food particles from water,… … Wikipedia
Bottom-Field — Der Begriff Halbbild wird in der Video und Fernsehtechnik ebenso wie in der Stereoskopie verwandt. Er soll die Unvollkommenheit eines einzelnen Halbbildes versinnbildlichen. Nur in paarweiser Gemeinsamkeit von Halbbildern ergeben sich die… … Deutsch Wikipedia
Bottom Field — Der Begriff Halbbild wird in der Video und Fernsehtechnik ebenso wie in der Stereoskopie verwandt. Er soll die Unvollkommenheit eines einzelnen Halbbildes versinnbildlichen. Nur in paarweiser Gemeinsamkeit von Halbbildern ergeben sich die… … Deutsch Wikipedia
Bottom Field First — Der Begriff Halbbild wird in der Video und Fernsehtechnik ebenso wie in der Stereoskopie verwandt. Er soll die Unvollkommenheit eines einzelnen Halbbildes versinnbildlichen. Nur in paarweiser Gemeinsamkeit von Halbbildern ergeben sich die… … Deutsch Wikipedia
filter bed — a pond or tank having a false bottom covered with sand and serving to filter river or pond waters. [1870 75] * * * … Universalium
