File:Hertzian spark radio transmitter 1902.jpg
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Hertzian_spark_radio_transmitter_1902.jpg (637 × 453 pixels, file size: 91 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:38, 1 May 2021 | ![]() | 637 × 453 (91 KB) | commons>Materialscientist | FFT |
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