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4 h 6 dic 1878 año - Switch board

Descripción:

The first phone with a manual switch board was invented in 1878 and it was first debuted in Boston

Añadido al timeline:

The History of Phones Timeline

BySathmini BATAGODA

29 nov 2017

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807

fecha:

4 h 6 dic 1878 año

Ahora mismo

~ 146 years ago

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