Amathangi okugcina umoya-mpilo owuketshezi kufanele aklanywe futhi enziwe ngezinto ezimelana nezinga lokushisa eliphansi, njengensimbi ye-cryogenic noma insimbi engagqwali, ukuze kuqinisekiswe ukuvaleka kwawo nokubanda emazingeni okushisa aphansi kakhulu.
