Oku kufanelekile ke kube yinxalenye yenkqubo yokuthutha ulwelo (ioyile, igesi, isitya, iikhemikhali, ...) ngendlela ekhuselekileyo nefanelekileyo.
I-Depex Stainess yensimbi iyafumaneka kwiDulpex ebalaseleyo, i-Depplex kunye namaBanga asemgangathweni, ngalinye linepropathi ethile yezicelo eziyahlukileyo.