valvé
121Valve audio amplifier - technical — Circuitry and performance Characteristics of valves Valves are very high input impedance (near infinite in most circuits) and high output impedance devices. They are also high voltage / low current devices.While valves themselves are described… …
122Valve RF amplifier — A valve RF amplifier (UK and Aus.) or tube amplifier (U.S.), is a device for electrically amplifying the power of an electrical , typically (but not exclusively) radio frequency signals.Low to medium power valve amplifiers for frequencies below… …
123Valve seat — The valve seat in an internal combustion gasoline or diesel engine is the surface against which an intake or an exhaust valve rests during the portion of the engine operating cycle when that valve is closed. The valve seat is a critical component …
124Valve tricuspide — En anatomie, les valves cardiaques sont des structures du cœur, séparant les différentes cavités et empêchant le sang de refluer dans le mauvais sens. La valve tricuspide est la valve cardiaque qui sépare l oreillette droite du ventricule droit.… …
125Valve Anti-Cheat — Предупреждение VAC при загрузке карты Valve Anti Cheat (сокращённо: VAC)  разработка компании Valve, для предотвращения использования игроками читов (нечестных приемов игры). Данная разработка является одним из компонентов Steam. VAC был… …
126Valve stem — For the shaft which transmits motion from the outside to the inside of a valve, see Valve#Stem. A valve stem is a self contained valve which opens to admit gas to a chamber (such as air to inflate a tire), and is then automatically closed and… …
127Valve timing — In a piston engine, the valve timing is the precise timing of the opening and closing of the valves.In four stroke cycle engines and some two stroke cycle engines, the valve timing is controlled by the camshaft. It can be varied by modifying the… …
128Valve guide — In most types of reciprocating engines, a valve guide is provided for each poppet valve in the cylinder head. Along with the valve spring, it serves to positively locate the valve so that it may make proper contact with the valve seat. A valve… …
