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6 abr 1809 ano - Постройка и испытание электрохимического телеграфа

Descrição:

в 1809 году немецкий учёный Самуил Томас Земмеринг построил и испытал электрохимический телеграф

Adicionado na linha do tempo:

Развитие сетей

ByГеоргий

9 dez 2018

0

0

368

Data:

6 abr 1809 ano

Agora

~ 216 years ago

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