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| history of radio ： ウィキペディア英語版 |
history of radio
The early history of radio is the history of technology that produced radio instruments that use radio waves. Within the timeline of radio, many people contributed theory and inventions in what became radio.〔(The Invention of Radio ) inventors.about.com/od/rstartinventions/a/radio.htm〕 Radio development began as "wireless telegraphy".〔 Later radio history increasingly involves matters of broadcasting
== Summary ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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