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File:Electrons Tubes Pre 1950 Thyratron Attribution.jpg

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Electrons_Tubes_Pre_1950_Thyratron_Attribution.jpg(450 × 600 pixels, file size: 67 KB, MIME type: image/jpeg)

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current20:55, 1 March 2012Thumbnail for version as of 20:55, 1 March 2012450×600 (67 KB)Beichner (Talk | contribs)

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