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4 gen 1920 anni - CONMUTACIÓN ELECTROMECÁNICA

Descrizione:

Antes de 1920 se añadieron discos de marcación a los teléfonos y los operadores fueron sustituidos conmutación electromecánica que empleaban motores y bielas

Aggiunto al nastro di tempo:

sobre el origen y la evolución del teléfono.

Bymade mendoza
17 feb 2021
0
0
339

Data:

4 gen 1920 anni
Adesso
~ 105 years ago

Immagini:

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