Slow_sand_filter_preparing_sand_bed.jpg (658 × 491 pixels, file size: 69 KB, MIME type: image/jpeg)
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current | 23:48, 7 December 2009 | 658 × 491 (69 KB) | Ibrahim (talk | contribs) | ||
revert | 23:43, 7 December 2009 | 1,029 × 829 (184 KB) | Ibrahim (talk | contribs) |
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