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The closed vacuum system

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  • Vacuum sewer — Vacuum sewers were first installed in Europe in 1882 but until the last 30 years it had been relegated to a niche market. The first who has applied the negative pressure drainage (so called vacuum sewerage) was the Dutch engineer Liernur in the… …   Wikipedia

  • Vacuum brake — The vacuum brake is a braking system used on trains. It was first introduced in the mid 1860s and a variant, the automatic vacuum brake system became almost universal in British train equipment, and in those countries influenced by British… …   Wikipedia

  • Vacuum — This article is about empty physical space or the absence of matter. For other uses, see Vacuum (disambiguation). Free space redirects here. For other uses, see Free space (disambiguation). Pump to demonstrate vacuum In everyday usage, vacuum is… …   Wikipedia

  • Vacuum pump — A vacuum pump is a device that removes gas molecules from a sealed volume in order to leave behind a partial vacuum. The vacuum pump was invented in 1650 by Otto von Guericke. Types Pumps can be broadly categorized according to three… …   Wikipedia

  • Vacuum distillation — At atmospheric pressure, dimethyl sulfoxide boils at 189°C. Under a vacuum, it distills off into the connected receiver at only 70°C. Vacuum distillation is a method of distillation whereby the pressure above the liquid mixture to be distilled is …   Wikipedia

  • The Hoover Company — Infobox Company company name = Hoover company company type = Division genre = Home Care foundation = 1907 founder = James Murray Spangler location city = location country = location = Glenwillow, Ohio origins = key people = area served = industry …   Wikipedia

  • Closed timelike curve — In mathematical physics, a closed timelike curve (CTC) is a worldline in a Lorentzian manifold, of a material particle in spacetime that is closed, returning to its starting point. This possibility was first raised by Kurt Gödel in 1949, who… …   Wikipedia

  • The Time Tunnel — Infobox Television show name = The Time Tunnel caption = The Time Tunnel intertitle format = Science fiction runtime = approx. 52 minutes creator = Irwin Allen starring = James Darren Robert Colbert Whit Bissell John Zaremba Lee Meriwether… …   Wikipedia

  • Vacuum assisted closure wound therapy — Vacuum assisted closure (VAC) is a technique of wound closure used to promote healing in large or chronic wounds, fight infection and enhance healing of burns. VAC seals the wound with a foam dressing and applies negative pressure to the wound… …   Wikipedia

  • The Last Puritan — The Last Puritan: A Memoir in the Form of a Novel was written by the American philosopher George Santayana. The novel is set largely in the fictional town of Great Falls, Connecticut; Boston; and England, in and around Oxford. It relates the life …   Wikipedia

  • Ultimate fate of the universe — The ultimate fate of the universe is a topic in physical cosmology. Many possible fates are predicted by rival scientific theories, including futures of both finite and infinite duration. Once the notion that the universe started with a Big Bang… …   Wikipedia

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