File:Slow sand filter.jpg
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Slow_sand_filter.jpg (593 × 397 pixels, file size: 261 KB, MIME type: image/jpeg)
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:10, 15 May 2012 | | 593 × 397 (261 KB) | Winona (talk | contribs) |
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