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29 nov 201 av. J.-C. - Smoke signals

Description:

Smoke signals were first used in Ancient China
to alert others of danger along the Great Wall.a

Ajouté au bande de temps:

Communications Timeline

ByZT
9 nov. 2018
1
0
335

Date:

29 nov 201 av. J.-C.
Maintenaint
~ Il y a 2227 ans
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