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| | Manhole cover - Encyclopedia, History, Geography and Biography |
 | | Manhole cover - Encyclopedia, History, Geography and Biography |
 | | This encyclopedia, history, geography and biography article about Manhole cover contains research on |
 | | Manhole cover, Why are they round?, Trivia, Can a race car lift a manhole cover?, The first man-made object in space?, Gallery of manhole covers, See also, References, External links, Collections of photos and Subterranea. |
| www.arikah.net /encyclopedia/Manhole_cover (743 words) |
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