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Elmer Woodward's new oil pressure relay valve water wheel governor ca 1912.

Elmer Woodward_s new oil pressure relay valve water wheel governor_ca 1912-xx.jpg IMPULSE TURBINES BY SMITH. BULLETIN 138.ThumbnailsVintage Hydroelectric Power Plant history.IMPULSE TURBINES BY SMITH. BULLETIN 138.ThumbnailsVintage Hydroelectric Power Plant history.IMPULSE TURBINES BY SMITH. BULLETIN 138.ThumbnailsVintage Hydroelectric Power Plant history.IMPULSE TURBINES BY SMITH. BULLETIN 138.ThumbnailsVintage Hydroelectric Power Plant history.

The Woodward hydraulic turbine water wheel governor was manufactured from 1911 through 1994. Today not may companies manufacture products like this type of governor to last over 100 years in continues operation.

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