An early 20th century electromechanical "rotary converter", resembling a generator, in an industrial space.
https://cdn.masto.host/federatesocial/media_attachments/files/113/567/459/817/831/372/original/071b158387b0d38e.jpg
Rotary Converter, IRT Subway Substation #13, NYC, 2017.
All the pixels, none of the noise or high voltages, at https://www.flickr.com/photos/mattblaze/32992380451
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