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- GENERAL ELECTRIC COMPANY ADVERTISEMENT.
- ALLIS-CHALMERS TURBINE WATER WHEEL.
- Elmer E. Woodward's state-of-the-art oil pressure relay valve water wheel governor patented in 1912.
- WOODWARD GATE SHAFT OIL PRESSURE GOVERNOR HISTORY.
- WOODWARD GATE SHAFT OIL PRESSURE GOVERNOR HISTORY.
- WOODWARD GATE SHAFT OIL PRESSURE GOVERNOR HISTORY.
- WOODWARD GATE SHAFT OIL PRESSURE GOVERNOR HISTORY.
- WOODWARD GATE SHAFT OIL PRESSURE GOVERNOR HISTORY.
- WOODWARD GATE SHAFT OIL PRESSURE GOVERNOR HISTORY.
- WOODWARD GATE SHAFT OIL PRESSURE GOVERNOR HISTORY.
- WOODWARD GATE SHAFT OIL PRESSURE GOVERNOR HISTORY.