használat közhely Felkiáltójel invenrion of radio Az állampolgárság országa Együttműködés fizetés
BBC Radio 4 - In Our Time, The Invention of Radio
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Who Invented Radio?
Guglielmo Marconi, 1st Marquis of Marconi, 1874 - 1937, Italian inventor and electrical engineer, inventor of radio, Nobel Prize Stock Photo - Alamy
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When was Radio invented?
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