constant-pressure operation
121Hydronics — is the name for the use of water as the heat transfer medium in heating and cooling systems. Some of the oldest and most common examples are steam and hot water radiators. In large scale commercial buildings such as high rise and campus… …
122Scar — Scars redirects here. For the 1998 video game, see S.C.A.R.S. (video game). Scarring redirects here. For the act of inflicting scars, see Scarification. This article is about scar tissue. For other uses, see Scar (disambiguation). Scar… …
123Oxygen concentrator — A home oxygen concentrator in situ in an emphysema patient s house. The model shown is the DeVILBISS LT 4000 …
124Jacobo Árbenz Guzmán — Jacobo Árbenz President of the Republic of Guatemala In office March 15, 1951 – June 27, 1954 Preceded by Ju …
125Vega program — The flyby of Halley s Comet had been a late mission change in the Venera program following on from the cancellation of the US Halley mission in 1981. A later Venera mission was cancelled and the Venus part of the Vega 1 mission was reduced.… …
126ČZ vz. 52 — Infobox Weapon name=Vz. 52 caption=Vz. 52 pistol origin=flag|Czechoslovakia type=Semi automatic pistol is ranged=yes service=1952 1982 (Czechoslovakia) used by= wars= designer=Jan Kratochvíl, Jaroslav Kratochvíl design date=1952 manufacturer=… …
127Women in the American Revolution — How it happened The American Revolution happened after Britain placed the Coercive Acts onto the colonies. The Americans responded by forming the Continental Congress and fighting with the British armies. However, the war would not have been able …
128RAF Alconbury — is a Royal Air Force station adjacent to the Stukeleys, near Alconbury and Huntingdon, Cambridgeshire in the United Kingdom, about 60 miles (100 km) north of London. Its runway and flight line were closed in the mid 1990s and it is currently a… …
