File:Czestosciomierz-49.9Hz.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 12:15, 24 March 2006 | ![]() | 1,804 × 947 (304 KB) | Julo | {{en|Mechanical resonance electromagnetic frequency meter}} power frequency: result = 49.9 Hz {{PD|self}} Category:Measuring instruments |
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