Organizational maintenance manual : teletypewriter sets, AN/GGC-3 (NSN 5815-00-503-3309), AN/GGC-3A (NSN 5815-00-581-9751), AN/GGC-53 (NSN 5815-01-012-8772), AN/GGC-53A (NSN 5815-01-017-0956) and teletypewriter reperforator-transmitters, TT-76/GGC (NSN 5815-00-503-2760) ..

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