Why is it better to have round manhole covers than square ones? – Yahoo Answers India

December 1, 2013

Sq. one can be rotated & dropped down the diagonal

http://in.answers.yahoo.com/question/index?qid=20080623124627AAp9dpS

This entry was posted on December 1, 2013 at 8:05 pm and is filed under -.

Tags: ,

Best to comment on twitter via @markgerstein. Only use this space for comments that are untweetable!