File:Ambrose pilot cable cross section.png

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Ambrose_pilot_cable_cross_section.png (387 × 210 pixels, file size: 20 KB, MIME type: image/png)

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Description
English: A 1921 depiction of the layers of the Ambrose Channel pilot cable.
Date
Source

Original publication: Proceedings of the Institute of Radio Engineers

Immediate source: https://books.google.com/books?id=REISAAAAIAAJ&pg=PA280#v=onepage&q&f=false
Author

A. Crossley

(Life time: Not needed for pre-1923 publication)


Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Ambrose_pilot_cable_cross_section.png

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current13:41, 26 August 2013Thumbnail for version as of 13:41, 26 August 2013387 × 210 (20 KB)Andrewman327 (talk | contribs){{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|A 1921 depiction of the layers of the Ambrose Channel pilot cable.}} |Source = '''Original publication''': Proceedings of the Institute of Radio Engineers<br/> '''Immediate sou...

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