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There is a page named "File:Strahler CS137.jpg" on Wikipedia
- DescriptionStrahler CS137.jpg English: 137CS radioactive source/emitter Deutsch: Umschlossener Prüfstrahler CS137 Date 28 May 2008 Source Own work Author...(900 × 307 (100 KB)) - 06:49, 21 July 2021