AM_DIM_UV_LENGTH_UNIT sets the length units for main dimension values.
---->(AM_DIM_UV_LENGTH_UNIT)----+---(:MM)--------------+------> | | +---(:CM)--------------+ | | +---(:MT)--------------+ | | +---(:KM)--------------+ | | +---(:INCHES)----------+ | | +---(:FRACT_INCH)------+ | | +---(:FT_FR_INCH)------+ | | +---(:FT_FR_IN_SIGN)---+ | | +---(:FT_FR_IN_TEXT)---+