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| Phonograph cylinder |
| Categories | Audio storage , 1877 introductions , 1888 introductions , Thomas Edison , Alexander Graham Bell , American inventions |
|---|---|
| Modification date "Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by Semantic MediaWiki.
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21:34:47, 13 June 2012 + |
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