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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
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4 set 1837 ano - Состоялась публичная демонстрация телеграфа Морзе

Adicionado na linha do tempo:

Морзе

ByЕкатеринв
7 out 2018

Data:

4 set 1837 ano
Agora
~ 186 years ago
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