File:HughesMicrophone.gif
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HughesMicrophone.gif (330 × 278 pixels, file size: 6 KB, MIME type: image/gif)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 14:45, 11 February 2008 | 330 × 278 (6 KB) | Gruzd | {{Information |Description=David E. Hughes's microphone |Source=Ж. Дари. Электричество во всех его применениях, с многочисленными иллюстрациями. С.-Петербург, типографи� |
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