Bellows

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Revision as of 05:54, 25 October 2006 by Ok (talk | contribs) (Based on Glossary of Bridge Terminology; Chapter LXXX of J.A.L. Waddell's Bridge Engineering (New York: Wiley, 1916))
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An apparatus or box with flexible leather sides so arranged by means of a valve that it may be opened and closed in succession, thereby producing a current of air.

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