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Manhole Covers

Manhole Covers

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Manhole Covers

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  1. Manhole Covers

  2. Ancient Roman made out of lime sandstone, 1st century AD,

  3. Hamline Avenue 1915

  4. Krakow, Poland 2012

  5. Nashua, New Hampshire Old one on top of it replacment

  6. Matsumoto, Japan

  7. Prague

  8. Germany

  9. Manhole Covers Why are they round?