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Señanles visuales de largo alcance: Sistemas semaforo (1870-1875) (8 mai 1870 – 8 sept. 1875)

Ajouté au bande de temps:

Historia de los teléfonos

ByLuis Miguel Serna Durango

21 oct. 2017

0

0

427

Date:

8 mai 1870

8 sept. 1875

~ 5 years and 4 months

Les images:

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