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Creation date / 2021 / April / 9
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- A Holyoke Machine Company's Water Wheel Governor advertisement from 1914.
- A vintage Hydro Power Industry advertisement project.
- A vintage Hydro Power Industry advertisement project.
- A vintage Hydro Power Industry project.
- A vintage Hydroelectric Power advertisement project.
- A vintage machine shop manufacturing history project.
- A vintage machine shop manufacturing history project.