Iimpawu: Ukudibanisa imibhobho, ithumbu, imibhobho kunye namatanki athutha ulwelo, umgubo kunye nomphunga,
kubandakanywa amanzi okupholisa, amafutha, iikhemikhali, izithambiso,
Umsebenzi: Indlela yokonga, efanelekileyo kunye nelula yokudlulisa ulwelo kunye neemveliso ezomileyo.
Zifumaneka kwiintlobo ngeentlobo zemathiriyeli kunye nobukhulu ukuze zilungele usetyenziso oluninzi