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jan 4, 1920 - CONMUTACIÓN ELECTROMECÁNICA
Description:
Antes de 1920 se añadieron discos de marcación a los teléfonos y los operadores fueron sustituidos conmutación electromecánica que empleaban motores y bielas
Added to timeline:
sobre el origen y la evolución del teléfono.
By
made mendoza
17 Feb 2021
0
0
337
Date:
jan 4, 1920
Now
~ 105 years ago
Images:
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