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• Incandescent light bulb
  ...nt.jpg|thumb|upright|[[Hungarian language|Hungarian]] advertising of the [[Tungsram]]-bulb from 1906. This was the first light bulb that used a filament made f ...pdf |archivedate=30 May 2005|url=http://www.tungsram.hu/tungsram/downloads/tungsram/tu_short_history_1896-1996.pdf|format=PDF}}</ref> Filling a bulb with an [[
  104 KB (15,285 words) - 16:44, 16 December 2018