air-supply system
51Water supply network — Public infrastructure …
52Turkish Air Force — Infobox Military Unit unit name= Turkish Air Force Türk Hava Kuvvetleri caption= Turkish Air Force Emblem start date= 1909 1911 country= TUR allegiance= branch= type= role= size=803 aircraft *65.000 personnel command structure= Turkish Armed… …
53AMMO (U.S. Air Force) — Ammo is also a commonly used abbreviation for ammunition. The Munitions Systems Specialist career field (AFSC 2W0X1, previously 461X0), commonly referred to as AMMO, is the munitions and weapons branch of the U.S. Air Force.Career Field… …
54Bleed air — in gas turbine engines is compressed air taken from within the engine, after the compressor stage(s) and before the fuel is injected in the burners. While in theory bleed air could be drawn in any gas turbine engine, its usage is generally… …
55Water supply and sanitation in Nicaragua — is provided by a national public utility in urban areas and water committees in rural areas. Despite relatively high levels of investment, access to water in urban areas has barely kept up with population growth, access to urban sanitation has… …
56Water supply and sanitation in the United States — is provided by towns and cities, public utilities that span several jurisdictions and rural cooperatives. About 15 million Americans are served by their own wells. Public water supply and sanitation systems are regulated by state level regulatory …
57Enriched Air Nitrox — Nitrox refers to any gas mixture composed (excluding trace gases) of nitrogen and oxygen; this includes normal air which is approximately 78% nitrogen and 21% oxygen, with around 1% inert gases, primarily argon.cite book |title=Bennett and… …
58Life support system — For other uses of Life support , see Life support (disambiguation). In human spaceflight, a life support system is a group of devices that allow a human being to survive in space. US government space agency NASA,[1] and private spaceflight… …
59MetroWest Water Supply Tunnel — Official name MWWST Begins Marlborough Ends Weston Maintained by MWRA …
60Global Positioning System — GPS redirects here. For other uses, see GPS (disambiguation). Geodesy Fundamentals …
