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10M telephones (1 jan 1918 ano – 31 dez 1918 ano)

Descrição:

It was estimated that approximately ten million Bell system telephones were in service throughout the U.S.

Adicionado na linha do tempo:

click for descriptions/PHONE TIMLINE

23 out 2018

0

0

420

Data:

1 jan 1918 ano

31 dez 1918 ano

~ 12 months

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