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New Technology Sheds Light on Century-Old Sound Recordings
VOA News 조회 수 92 추천 수 0 2015.02.20 02:01:18
Alexander Graham Bell is probably best known for inventing the telephone. But he also played a vital role in creating and innovating sound recordings. The Smithsonian's National Museum ... |
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원문출처 : http://www.youtube.com/watch?v=ADRnATMGkGg&feature=youtube_gdata