Air conditioner — For general aspects of air conditioning, see Air conditioning. A typical home air conditioning unit. An air conditioner (often referred to as AC) is a home appliance, system, or mechanism designed to dehumidify and extract heat from an area. The… … Wikipedia
Plastic pipework — standards for the conveyance of drinking water,waste water, chemicals, heating and cooling fluids, foodstuffs, ultra pure liquids, slurries, gases, compressed air and vacuum system applications. Plastic Pressure Pipe Systems have many advantages… … Wikipedia
Cabin pressurization — is the active pumping of compressed air into an aircraft cabin when flying at altitude to maintain a safe and comfortable environment for crew and passengers in the low outside atmospheric pressure.Pressurization is essential over 3,000 m (10,000 … Wikipedia
Railway brake — A traditional clasp brake: the brake shoe (brown) bears on the surface (tyre) of the wheel (red), and is operated by the levers (grey) on the left … Wikipedia
Player piano — The player piano is a self playing piano, containing a pneumatic mechanism that plays on the piano action pre programmed music via perforated paper rolls. The rise of the player piano grew with the rise of the mass produced piano in the house and … Wikipedia
John Ernst Worrell Keely — (September 3 1827 – November 18 1898) was a US inventor from Philadelphia who invented the Keely Motor which he claimed to be capable of perpetual motionfact|cite where he said this|October 2008. Keely invented, reportedlyfact|cite where this is… … Wikipedia
Steam engine — A steam engine is a heat engine that performs mechanical work using steam as its working fluid. [ [http://www.britannica.com/EBchecked/topic/564472/steam engine steam engine Britannica Online Encyclopedia ] ] Steam engines have a long history,… … Wikipedia
Hydrogen peroxide — IUPAC name … Wikipedia
Charles Pearson — For other people named Charles Pearson, see Charles Pearson (disambiguation). Charles Pearson Charles Pearson, circa 1855 Born 4 October 1793(1793 10 04) City of London … Wikipedia
Pipe (fluid conveyance) — For structural pipe, see Hollow structural section. For other uses, see Pipe (disambiguation). Steel pipes … Wikipedia
