Dim ond 500 cylch sy’n cael eu mapio. Mae’r lliw’n amrywio’n ôl y math o gylch.
Only 500 groups are mapped. The colour varies according to type of cylch.
Dim ond 500 cylch sy’n cael eu mapio. Mae’r lliw’n amrywio’n ôl y math o gylch.
Only 500 groups are mapped. The colour varies according to type of cylch.