File:Dynatron signal generator 1931.jpg
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Dynatron_signal_generator_1931.jpg (202 × 263 pixels, file size: 11 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:13, 3 November 2015 | ![]() | 202 × 263 (11 KB) | commons>Chetvorno | User created page with UploadWizard |
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