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6 apr 1809 anni - Постройка и испытание электрохимического телеграфа

Descrizione:

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

Aggiunto al nastro di tempo:

Развитие сетей

ByГеоргий

9 dic 2018

0

0

373

Data:

6 apr 1809 anni

Adesso

~ 216 years ago

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