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23 dez 1878 ano - Telephone exchange.
Descrição:
1878 The first telephone exchange is set up in New Haven, USA. It consisted of a manual controller board of 21 subscribers.
Adicionado na linha do tempo:
Line of time Hector de Jesús López Rosales
By
Hector J Lopez
20 out 2017
0
0
278
Data:
23 dez 1878 ano
Agora
~ 145 years ago
Imagens:
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