File:Bell telephone magazine (1922) (14733173366).jpg

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English:

Identifier: belltelephonevol3132mag00amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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Station operators at the dam below read signals showingthe position^ at three unattended automatic substations^of main tra^ismission line switches^ feeder oil circuitbreakers^ changes in oil temperatures^ operating airpressures^ control voltages, and similar operating data
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27 July 2014

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This image was originally posted to Flickr by Internet Archive Book Images at https://flickr.com/photos/126377022@N07/14733173366. It was reviewed on 18 September 2015 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions.

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