Originally Posted by metalmuncher
Originally Posted by joshm28
Try explaining flatness in microns. It gets confusing pretty quick


Well, I wasn't going to bring up microns, puncheons, hogsheads, rods, or cubits. But since it's been brought up, can any of you without the help of google define more than one of them?

i know a micron is one millionth of a meter only because I use a micron gauge to leak check hvac systems have not a clue about the others