redundant power supply unit
51Space Shuttle Solid Rocket Booster — The Space Shuttle Solid Rocket Boosters (SRBs) are the pair of large solid rockets used by the Space Shuttle during the first two minutes of powered flight. They are located on either side of the orange external propellant tank. Each SRB produces …
52United Kingdom — a kingdom in NW Europe, consisting of Great Britain and Northern Ireland: formerly comprising Great Britain and Ireland 1801 1922. 58,610,182; 94,242 sq. mi. (244,100 sq. km). Cap.: London. Abbr.: U.K. Official name, United Kingdom of Great… …
53Dornier Do 17 — Do 17 A formation of Dornier Do 17Zs, circa 194 …
54British Rail Class 313 — A refreshed Southern Class 313 No. 313203 at Brighton on the West Coastway Line …
55Cotton mill — A cotton mill is a factory that houses spinning and weaving machinery. Typically built between 1775 and 1930, mills spun cotton which was an important product during the Industrial Revolution. Cotton mills, and the mechanisation of the spinning… …
56eye, human — ▪ anatomy Introduction specialized sense organ capable of receiving visual images, which are then carried to the brain. Anatomy of the visual apparatus Structures auxiliary to the eye The orbit The eye is protected from mechanical injury… …
57Phillips curve — The Phillips curve is a historical inverse relation between the rate of unemployment and the rate of inflation in an economy. Stated simply, the lower the unemployment in an economy, the higher the rate of increase in wages paid to labor in that… …
582008 Western Australian gas crisis — The Western Australian gas crisis is a significant and widespread disruption to natural gas supply in Western Australia, caused by a pipeline rupture and explosion at a processing plant on Varanus Island, off the state s north west coast on 3… …
59Armoured warfare — This article is about the military doctrine. For the tactical wargame, see Armored Brigade (video game). British tanks advancing under fire at the Second Battle of El Alamein during World War II …
60Glossary of rail terminology — Rail transport Operations Track Maintenance High speed Gauge Stations …
