File:Early NBS crystal oscillator frequency standards.jpg
Early_NBS_crystal_oscillator_frequency_standards.jpg (700 × 395 pixels, file size: 66 KB, MIME type: image/jpeg)
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Date/Time | Dimensions | User | Comment | |
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current | 11:12, 3 September 2013 | 700 × 395 (66 KB) | Chetvorno | User created page with UploadWizard |
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