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21 out 1832 ano - Публичная демонстрация первого электромагнитного телеграфа, созданного российским ученым Павлом Шиллингом.
Adicionado na linha do tempo:
информация и сигналы
By
Мария
10 out 2019
0
0
207
Data:
21 out 1832 ano
Agora
~ 191 years ago
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