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Definition of bellows:

  1. An instrument, utensil, or machine, which, by alternate expansion and contraction, or by rise and fall of the top, draws in air through a valve and expels it through a tube for various purposes, as blowing fires, ventilating mines, or filling the pipes of an organ with wind.


blowlamp, bow, adjustable wrench, drumstick, fret, bridge, bit, bradawl, head, Allen wrench, blowtorch, catgut, hammer, awl, damper, key, applicator, blower, box end wrench.

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