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1 jan 1888 ano - Battery Systems

Descrição:

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.

Adicionado na linha do tempo:

History of Phones

ByOsasere Guobadia
24 out 2018

Data:

1 jan 1888 ano
Agora
~ 136 years ago

Imagens:

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