File:Marconi crystal radio receiver.jpg
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Marconi_crystal_radio_receiver.jpg (754 × 552 pixels, file size: 134 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:08, 3 May 2021 | 754 × 552 (134 KB) | commons>Materialscientist | FFT |
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