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- The Pelton Water Wheel Company history, circa 1919.
- A run of the river small hydro-electric power plant from 1915.
- THE LOMBARD GOVERNOR COMPANY, CIRCA 1919.
- General Electric Company ad from 1919.
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- Woodward type 3 water wheel governor from the 1920 s
- Woodward standard type governor
- Woodward standard type 3 water wheel governor
- Woodward Standard type water wheel governor
- Woodward water wheel governor nameplate
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