Umnyango womlilo wensimbi wenziwe ngensimbi yekhwalithi ephezulu futhi ugcwaliswe ngokucophelela ngezinto ezivimbela umlilo ngaphakathi. Ukumelana nomlilo kuyisici esikhulu kunazo zonke seminyango yomlilo yensimbi, futhi kuyinzuzo ukuthi lolu hlobo lomnyango lungathuthukiswa.