- 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. 2012.
Useful english dictionary. 2012.
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
Distributed element filter — Figure 1. A circuit featuring many of the f … Wikipedia
Dichroic filter — Dichroic filters A dichroic filter, thin film filter, or interference filter is a very accurate color filter used to selectively pass light of a small range of colors while reflecting other colors. By comparison, dichroic mirrors and dichroic… … Wikipedia
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Sallen–Key filter — A Sallen–Key filter is a type of active filter, particularly valued for its simplicity. The circuit produces a 2 pole (12 dB/octave) lowpass or highpass response using two resistors, two capacitors and (usually) a unity gain buffer amplifier.… … Wikipedia
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environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations … Universalium
Violin construction and mechanics — A violin consists of a body or corpus, a neck, a bridge, a soundpost, four strings, and various fittings. The fittings are the tuning pegs, tailpiece and tailgut, endpin, possibly one or more fine tuners on the tailpiece, and perhaps a chinrest,… … Wikipedia
Military equipment of Turkey — The military equipment of Turkey includes a wide array of arms, artilleries, large surface vessels, cannons, armored vehicles, mortars, unmanned vehicles and many different equipments. Contents 1 Historical development 1.1 General 1.2 1923 1950 … Wikipedia
Water purification — This article is about large scale, municipal water purification. For portable/emergency water purification, see portable water purification. For industrial water purification, see deionized water. For distilled water, see distilled water. Water… … Wikipedia