File:Slow sand filter diagram.jpg
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Slow_sand_filter_diagram.jpg (543 × 365 pixels, file size: 74 KB, MIME type: image/jpeg)
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:23, 22 May 2012 | | 543 × 365 (74 KB) | Winona (talk | contribs) |
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