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- Advances in Hydro equipment 002
- GL 008
- Specs 013
- Historic information on the Tinker Swiss Cottage.
- Vintage Water Wheel Governor Bulletin No 1-A 005
- Vintage ad for Allis-Chalmers Company
- Woodward PG 500 Governor Bulletin 14025 010
- Woodward type UG dial governor manual 56103A
- WOODWARD MANUAL 14000C.
- Patent 2,565,041. Page 5.
- DSC03794
- Grandpa's study book notes.
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- Page 34.
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