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American telephone practice (1905)

Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 687

An illustration from American telephone practice, 1905, leaf 687
ain frame, and thisbay will be provided with the same number of relays as there arearresters on a corresponding space on the main frame. This makesit possible to extend all cables straight across between the frames,thus securing a systematic arrangement without piling up the cablesin a compact…

Telephone

Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.

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