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ELMER WOODWARD'S FIRST HYDRAULIC TURBINE WATER WHEEL GOVERNOR PATENT.

20181003003550-7084d549-xx.jpg ELMER WOODWARD'S FIRST HYDRAULIC TURBINE WATER WHEEL GOVERNOR PATENT.ThumbnailsElmer Woodward's new hydraulic governor developed and patented in 1912.ELMER WOODWARD'S FIRST HYDRAULIC TURBINE WATER WHEEL GOVERNOR PATENT.ThumbnailsElmer Woodward's new hydraulic governor developed and patented in 1912.ELMER WOODWARD'S FIRST HYDRAULIC TURBINE WATER WHEEL GOVERNOR PATENT.ThumbnailsElmer Woodward's new hydraulic governor developed and patented in 1912.ELMER WOODWARD'S FIRST HYDRAULIC TURBINE WATER WHEEL GOVERNOR PATENT.ThumbnailsElmer Woodward's new hydraulic governor developed and patented in 1912.