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Action (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… … Wikipedia
Plastic — is the general common term for a wide range of synthetic or semisynthetic organic solid materials suitable for the manufacture of industrial products. Plastics are typically polymers of high molecular weight, and may contain other substances to… … Wikipedia
Phonograph — Turntable redirects here. For other uses, see Turntable (disambiguation). Edison cylinder phonograph ca. 1899 … Wikipedia
Ceiling fan — A ceiling fan is a fan, usually electrically powered, suspended from the ceiling of a room, that uses hub mounted rotating paddles to circulate air. Casablanca Fan Co. ceiling fan from the early 1980s. A ceiling fan rotates much mo … Wikipedia

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