Two-valved
121Pulse detonation engine — A pulse detonation engine, or PDE , is a type of propulsion system that can operate from subsonic up to hypersonic speeds. In theory the PDE design can produce an engine with a burn efficiency higher than other designs, with considerably fewer… …
122Valve amplifier — A valve amplifier or tube amplifier is a type of electronic amplifier that make use of vacuum tubes instead of solid state semiconductor devices (such as transistors). As any other electronic amplifier they serve to increase the power and/or… …
123Lighter — For other uses, see Lighter (disambiguation). A generic, disposable lighter …
124Hickory — Taxobox name = Hickory image width = 230px image caption = Hickory at Morton Arboretum Accession 29 U 10 regnum = Plantae divisio = Magnoliophyta classis = Magnoliopsida ordo = Fagales familia = Juglandaceae genus = Carya genus authority = Nutt.… …
125Overblowing — (a) A technique used while playing a wind instrument which, primarily through manipulation of the supplied air (versus, e.g., a fingering change or operation of a slide), causes the sounded pitch to jump to a higher one. Depending on the… …
126Fromental Halévy — Jacques François Fromental Élie Halévy (May 27, 1799 March 17, 1862) (usually known as Fromental Halévy) was a French composer. He is known today largely for his opera La Juive .Early careerHalévy was born in Paris, the son of a cantor, Elie… …
127Sourwood — Taxobox name = Sourwood image width = 240px regnum = Plantae divisio = Magnoliophyta classis = Magnoliopsida ordo = Ericales familia = Ericaceae genus = Oxydendrum DC. species = O. arboreum binomial = Oxydendrum arboreum binomial authority = (L.) …
128Reed valve — Reed valves restrict flow of gases to a single direction and consist of thin flexible metal or fiberglass strips fixed on one end that open and close upon changing pressures across opposite sides of the valve. They operate in a similar manner to… …
