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apr 18, 1820 - Первый электромагнитный телеграф

Description:

Первый электромагнитный телеграф изобрел великий физик Андре-Мари Ампер в 1820 году.

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ByПиневская Влада
6 Nov 2018

Date:

apr 18, 1820
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~ 204 years ago

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