energy, electricity, three-phase motor, engine room of the mine Grand Hornu, Belgium, 1904, Additional-Rights-Clearences-Not Available

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Photo credit: © INTERFOTO / History / Alamy / Afripics
License: Licensed
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Keywords: -phase, .., 1900s, 20th, central, century, coal, companies, company, current, deep, electricity, energy, engine, engines, facility, grand, high, historic, historical, industries, industry, mines, mining, motor, motors, open-cut, open-pit, opencast, pit, pits, production, room, underground, voltage