Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 328
BOX FOR IFILE. BO»| FOR SENT MSQS RECEPTACLES B*CAREUSE7 ONLY WHEN TWOSCHOOL TABLES AREINTERCONNECTED … Fig. 8 Page 6 Section 8 Multiplex System 263-C NOTE-HEAVV LINES INDICATE NEW WIRIN6
Telegraph
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