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1 ene 1888 año - Battery Systems

Descripción:

Common battery system developed by Hammond V. Hayes, allows one central battery to power all telephones on an exchange, rather than relying on each unit's own battery.

Añadido al timeline:

History of Phones

ByOsasere Guobadia
24 oct 2018

fecha:

1 ene 1888 año
Ahora mismo
~ 136 years ago

Fotos:

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