area unit
square millimeter
"An area unit which is equal to one millionth of a square meter or 10^[-6] m^[2]." [NIST:NIST]
mm^[2]
square millimetre
square millimeter based unit
square millimeter
"An area unit which is equal to one millionth of a square meter or 10^[-6] m^[2]." [NIST:NIST]
mm^[2]
square millimetre