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Relay valve oil pressure water wheel governor patent 1,106,434.

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Elmer Woodward hydraulic(oil pressure) turbine water wheel governor patent.

Elmer E. Woodward's first oil pressure(hydraulic) water wheel governor.

Created on: Sunday 18 July 2010
Posted on: Friday 26 February 2016
Albums: Historical Woodward Governor Company Prime Mover Control Patents.
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