Lona uphini wensimbi oqinile woqweqwe lwawo, sigcwalisa imibala yoqweqwe lwawo kuze kube semkhawulweni wembobo yensimbi bese sipholisha isicaba soqweqwe lwawo ukuze bushelelezi futhi bucwebezele. Inemibala ecebile futhi ehlala isikhathi eside, ukuthungwa okuhle nokucwebezela. Izinto ezivamile zensimbi zihlanganisa i-zinc alloy, ithusi, njll., engaqinisekisa ukuqina nokuqina kwephini.
