File:Incandescent Electric Lighting - Fig 20.png
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current | 20:51, 31 March 2022 | 1,261 × 721 (219 KB) | Sp1nd01 | Uploaded a work by Louis H. Latimer from https://en.wikisource.org/wiki/Page:Incandescent_electric_lighting-_A_practical_description_of_the_Edison_system.djvu/76 with UploadWizard |
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