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9 gen 1887 anni - Railroad Telegrph
Descrizione:
Date:1887
inventor: Granville Woods
Purpose: To reduce risk of collisions by allowing trains to communicate
Aggiunto al nastro di tempo:
4 set 2018
0
0
131
history
Data:
9 gen 1887 anni
Adesso
~ 137 years ago
Immagini: