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carbon filament lamp, grey coloured bulb results from sublimated carbon, which has been deposited at the inner glass surface

Source Self-photographed
Author Ulfbastel


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current14:58, 23 April 2007Thumbnail for version as of 14:58, 23 April 20071,061 × 914 (92 KB)Ulfbastel (talk | contribs){{Information |Description=carbon filament lamp Kohlefadenlampe |Source=own photo |Date=23. Apr. 2007 |Author=~~~ }}
14:55, 23 April 2007Thumbnail for version as of 14:55, 23 April 20071,061 × 914 (93 KB)Ulfbastel (talk | contribs){{Information |Description=carbon filament lamp |Source=own photo |Date=23. Apr. 2007 |Author=~~~ }}
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