Kwiminyaka yakutshanje, icandelo lezorhwebo libone inkqubela phambili kubuchwephesha, ngakumbi kwicandelo lokususwa kwenkunkuma. Iinkqubo zerobhothi zokususa inkunkuma yemizi - mveliso zivula indlela yokucoca iindawo zokusebenza ezifanelekileyo. Ezi nkqubo zerobhothi zenzelwe ukuzenzekelayo inkqubo yokucoca izinto zenkunkuma, ezenza ibe yinxalenye ebalulekileyo kumashishini ahlukeneyo. Enye ye-
