File:Edison carbon filament lamps.jpg

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English: carbon-filament bulb from Thomas Edison's shop in Menlo Park, preside over their introduction in a system of lighting.
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Source https://en.wikipedia.org/wiki/War_of_Currents
Author https://en.wikipedia.org

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current13:50, 11 April 2016Thumbnail for version as of 13:50, 11 April 2016330 × 174 (14 KB)Ye Efrem (talk | contribs)User created page with UploadWizard

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