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apr 6, 1809 - Постройка и испытание электрохимического телеграфа

Description:

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

Added to timeline:

Развитие сетей

ByГеоргий

9 Dec 2018

0

0

379

Date:

apr 6, 1809

Now

~ 217 years ago

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