grind (off) burrs

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Coffee preparation — For the agricultural and industrial processes for producing whole coffee beans, see Coffee processing. Coffee preparation is the process of turning coffee beans into a beverage. While the particular steps needed vary with the type of coffee… … Wikipedia
machine tool — machine tooled, adj. a power operated machine, as a lathe, used for general cutting and shaping of metal and other substances. [1860 65] * * * Stationary, power driven machine used to cut, shape, or form materials such as metal and wood. Machine… … Universalium
Die grinder — A pneumatic die grinder with a right angle head. A die grinder is a handheld power tool used to grind, sand, hone, polish, or machine material, typically metal but also plastic or wood. They are usually pneumatically driven, although versions… … Wikipedia
Cotton gin — Eli Whitney s cotton gin patent, March 14, 1794 … Wikipedia

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