volume damper
11Bicycle fork — A bicycle fork is the portion of a bicycle that holds the front wheel and allows the rider to steer and balance the bicycle. A fork consists of two dropouts which hold the front wheel axle, two blades which join at a fork crown , and a steerer or …
12Duct (HVAC) — A round galvanized steel duct connecting to a typical diffuser Fire resistance rated …
13Business and Industry Review — ▪ 1999 Introduction Overview Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …
14Categorical perception — is the perception of different sensory phenomena as being qualitatively,or categorically, different. It is opposed to continuous perception , the perception of different sensory phenomena as being located on a smooth continuum.Categorical… …
15Action (piano) — The action of a piano is the mechanical assembly which translates the depression of the piano keys into a felt hammer striking the strings. The illustration to the right is of a circa 1907 Wessell, Nickel and Gross Upright action; the parts are… …
16Bicycle suspension — refers to the system or systems used to suspend the rider and all or part of the bicycle in order to protect them from the roughness of the terrain over which they travel. Bicycle suspension are used primarily on mountain bicycles, but are also… …
17keyboard instrument — ▪ music Introduction any musical instrument on which different notes can be sounded by pressing a series of keys, push buttons, or parallel levers. In nearly all cases in Western music the keys correspond to consecutive notes in the… …
18Dust collector — Two rooftop dust collectors in Pristina, Kosovo A dust collector is a system used to enhance the quality of air released from industrial and commercial processes by collecting dust and other impurities from air or gas. Designed to handle heavy… …
19Americus Backers — Americus Backers, sometimes described as the father of the English grand pianoforte style, brought the hammer striking action for keyboard instruments from his master Gottfried Silbermann’s workshop in Freiburg to England in the mid 18th Century …
20Russia — /rush euh/, n. 1. Also called Russian Empire. Russian, Rossiya. a former empire in E Europe and N and W Asia: overthrown by the Russian Revolution 1917. Cap.: St. Petersburg (1703 1917). 2. See Union of Soviet Socialist Republics. 3. See Russian… …
