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Creation date / 2019 / All / 1
- Page 12. Picture credit Phillip M. Goldstein.
- Elmer Woodward's new hydraulic turbine water wheel governor developed and patented in 1912.
- An original picture of a Woodward VR(vertical relay) type hydraulic governor manufactured in 1916.
- S. MORGAN SMITH COMPANY HISTORY
- POWER MAGAZINE HISTORY.
- ''WE LOVE THINGS MECHANICAL"
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