a phasour is a type of () = book () = letter () = exchange of hue () = exchange of bue bias hue aof liofe eco - coleu systeme aof liofe systeme coelu coelu coleu ecosysteme phasour phasear phaseireeriyoerp echo systeme ecosysteme

a typical system of the the phasour is oerp eco coleu with the () = phasour () = book () = letter () = exchange