Circular millimetre

A circular millimetre is a unit of area, equal to the area of a circle with a diameter of one millimetre. It has been used mainly for wire sizes. Symbol of the unit is cmm.

Circular millimetre

A circular millimetre is a unit of area, equal to the area of a circle with a diameter of one millimetre. It has been used mainly for wire sizes. Symbol of the unit is cmm.