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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
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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
By
ZT
9 nov 2018
1
0
332
Data:
29 nov 201 ano antes da era comum
Agora
~ 2227 years ago
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