File:Czestosciomierz-49.9Hz.jpg

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Description
English: Mechanical resonance electromagnetic frequency meter - power frequency: result 49.9 Hz
Deutsch: Zungenfrequenzmesser zur elektromechanischen Messung der Netzfrequenz. Messwert: 49,9 Hz
Date 24 March 2006 (according to Exif data)
Source No machine-readable source provided. Own work assumed (based on copyright claims).
Author No machine-readable author provided. Julo assumed (based on copyright claims).

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Julo, the copyright holder of this work, hereby publishes it under the following license:
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24 March 2006

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Date/TimeThumbnailDimensionsUserComment
current12:15, 24 March 2006Thumbnail for version as of 12:15, 24 March 20061,804 × 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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