03-01-2014, 06:43 AM
mm is used for technical drawings, for machinery. It's a common standard. (Worldwide as far as I know).
when you come up into sizes of planes/ships, I can't say I'm sure, but during my training as a technical drawer, nothing but mm was ever being mentioned.
when you come up into sizes of planes/ships, I can't say I'm sure, but during my training as a technical drawer, nothing but mm was ever being mentioned.