pan <pan### [at] syix com> wrote:
> Round manholes fit whichever orientation you drop them.
> Round manholes cover (usually) cyclindrical access spaces which are
> better able to resist ground pressures and (again) permit putting
> thiings
> into them without concern for orientation. (Round pegs/square
> holes:
> square pegs/round holes).
You left out the fact that a round cover will not fall into the manhole
no matter how you might screw up opening it.
--
- Warp
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