Freaky Facts #1 Manhole

in fact •  6 years ago 

Manhole covers are always round because they rest on a lip that is smaller than the cover. thses means the cover cannot fit through the opening on any angle. a square or rectangle cover could fall through.

hinklr Freaky facts
image: https://www.artsfon.com/pic/201511/2560x1600/artsfon.com-77181.jpg

v4Qr59I.gif

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