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- ELMER WOODWARD'S FIRST HYDRAULIC TURBINE WATER WHEEL GOVERNOR PATENT.
- Woodward Oil Pressure Relay Valve Governor Manual, circa 1912.
- Woodward Oil Pressure Relay Valve Governor Manual.
- Woodward Oil Pressure Relay Valve Governor.
- Woodward Oil Pressure Relay Valve Governor Schematic Drawing.
- Woodward Oil Pressure Relay Valve Governor Manual.
- Woodward Oil Pressure Relay Valve Governor Manual.
- Woodward Oil Pressure Relay Valve Governor Manual.
- Woodward Oil Pressure Relay Valve Governor Manual Page 3.
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