3 ms·

Please note that most pistons and cylinder bores are also not circles ;-)

• userbinator 3y ago
  ...and haven't been for at least 76 years: https://news.ycombinator.com/item?id=15397926 https://news.ycombinator.com/item?id=15397926 (Original page seems to have moved; it is now here: https://www.web.imperialclub.info/Repair/Lit/Master/003/index.htm https://www.web.imperialclub.info/Repair/Lit/Master/003/inde... )