positive drainage
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Positive pressure ventilation — Intervention ICD 9 CM 93.90 93.91 Me … Wikipedia
Drainage system (Agriculture) — An agricultural drainage system is a system by which the water level on or in the soil is controlled to enhance agricultural crop production.=Classification=Figure 1 classifies the various types of drainage systems. It shows the field (or… … Wikipedia
Drainage system (agriculture) — An agricultural drainage system is a system by which the water level on or in the soil is controlled to enhance agricultural crop production. Contents 1 Classification 1.1 Surface drainage systems 1.2 Subsurface drainage systems … Wikipedia
Drainage (Geotechnik) — Unter einer Drainage, auch Dränage, versteht man in der Geotechnik das unterirdische Erfassen von Wasser (im Bereich des Untergrundes) und das drucklose Abführen zu einem Vorfluter im Bereich des Bauwerkes. Folgende Möglichkeiten eine Drainage… … Deutsch Wikipedia
Plumbing drainage venting — A building s waste disposal system has two parts: the drainage system and the venting system. The drainage system, also called traps and drains, comprises pipes leading from various plumbing fixtures to the building drain (indoors) and then the… … Wikipedia
Acid mine drainage — Yellow boy in a stream receiving acid drainage from surface coal mining. Acid mine drainage (AMD), or acid rock drainage (ARD), refers to the outflow of acidic water from (usually abandoned) metal mines or coal mines. However, other areas where… … Wikipedia
Tile drainage — (in agriculture) is an agriculture practice that removes excess water from soil subsurface. Whereas irrigation is the practice of adding additional water when the soil is naturally too dry, drainage brings soil moisture levels down for optimal… … Wikipedia
Steam assisted gravity drainage — (SAGD) is an enhanced oil recovery technology for producing heavy crude oil and bitumen. It is an advanced form of steam stimulation in which a pair of horizontal wells is drilled into the oil reservoir, one a few metres above the other. Low… … Wikipedia
Trail — This article is about paths, tracks or other routes used for travel. For other uses, see Trail (disambiguation). A hiking trail in autumn … Wikipedia
Australia — /aw strayl yeuh/, n. 1. a continent SE of Asia, between the Indian and the Pacific oceans. 18,438,824; 2,948,366 sq. mi. (7,636,270 sq. km). 2. Commonwealth of, a member of the Commonwealth of Nations, consisting of the federated states and… … Universalium
