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The workable Exchange (1 jan 1878 ano – 31 dez 1878 ano)

Descrição:

The workable exchange was developed, which enabled calls to be switched between subscribers rather than having direct lines.

Adicionado na linha do tempo:

click for descriptions/PHONE TIMLINE

23 out 2018

0

0

420

Data:

1 jan 1878 ano

31 dez 1878 ano

~ 12 months

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