Ukuwela umbhobho kusetyenziswa apho imibhobho emine ihlangana khona. Umbhobho womnqamlezo usenokuba ne-inlet enye kunye neendawo ezintathu, okanye ii-intelets ezintathu kunye nekhuphoni enye. Ububanzi bendawo yokuphuma kunye ne-inlet bunokufana okanye zahlukile.
