electric valve
121technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …
122Lead-acid battery — Batteries caption=A valve regulated lead acid battery EtoW=30 40 Wh/kg EtoS=60 75 Wh/L PtoW=180 W/kg|CtoDE=70% 92% EtoCP=7(sld ) 18(fld ) Wh/US$ [http://www.geocities.com/CapeCanaveral/Lab/8679/battery.html] SDR=3% 20%/month… …
123Tram controls — The following article describes the controls on electric, rather than steam trams.OverviewThe operation of trams is relatively simple. As trams run on rails, they do not require steering controls. However they do require controls for the smooth… …
124Radiator (engine cooling) — For other uses, see Radiator (disambiguation). A typical engine coolant radiator used in an automobile Radiators are used for cooling internal combustion engines, mainly in automobiles but also in piston engined aircraft, railway locomotives,… …
125Programmable logic controller — A programmable logic controller (PLC) or programmable controller is a digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines. PLCs are used in many different industries and machines… …
126Samovar — A samovar Audio|ru samovar.ogg|listen (Russian: самовар, IPA ru|səmɐˈvar literally self boiler ) is a heated metal container traditionally used to heat and boil water in and around Russia, as well as in other Slavic nations, Iran, Kashmir, and… …
127SEAT León — Infobox Automobile boxcolor = darkgreen name = SEAT León manufacturer = SEAT assembly = Martorell, Spain production = 1999 present platform = Volkswagen Group A platform series class = Small family car body style = 5 door hatchback layout = Front …
128Electro-pneumatic brake system on British railway trains — The Electro pneumatic brake system on British railway trains was introduced in 1950. The Southern Region of British Railways operated an intensive self contained fleet of electric multiple units for suburban and middle distance passenger trains.… …
