Ubufakazi bokuqhuma kwe-Shenhai
Amafutha anamandla ayakwazi ukuvutha, nokho ukwakheka kwayo okuminyene kukwenza kube inselele ekukhanyeni futhi kuvimbele ukusha okuphelele. Nokho, ezindaweni ezinomoya-mpilo omningi, amafutha anzima angashisa kalula.
Amafutha okugcoba, ngenkathi ivutha, ayivuthi lapho ithinta ilangabi ngokushesha njengoba kungase kucatshangwe. Ibandakanyeka ekuphenduleni kwe-oxidation, elithambile ngokushuba.