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29 nov 201 ano antes da era comum - Smoke signals

Descrição:

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

Adicionado na linha do tempo:

Communications Timeline

ByZT

9 nov 2018

1

0

455

Data:

29 nov 201 ano antes da era comum

Agora

~ 2229 years ago

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