File:CAWST Biosand.png
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Cross-section of concrete biosand filter. Source: CAWST
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:30, 20 April 2009 | | 639 × 1,078 (395 KB) | Marktielewestra (talk | contribs) | Cross-section of concrete biosand filter. Source: CAWST |
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