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Señanles visuales de largo alcance: Sistemas semaforo (1870-1875) (8 Mai 1870 Jahr – 8 Sept 1875 Jahr)

Zugefügt zum Band der Zeit:

Historia de los teléfonos

ByLuis Miguel Serna Durango

21 Okt 2017

0

0

420

Datum:

8 Mai 1870 Jahr

8 Sept 1875 Jahr

~ 5 years and 4 months

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