Iintsimbi zokufulela—ezidla ngokwenziwa ngamazinki, i-aluminiyam, okanye intsimbi egqunywe ngezinki—ziye zaba zezona zinto zithenjwayo zokufulela kulwakhiwo lwale mihla. Banikezela ngendibaniselwano ekhethekileyo yamandla, ukusebenza kakuhle kwamandla, kunye nokukhanga okubonakalayo okwenza ukuba bafanelekele uluhlu olubanzi lwezakhiwo, ukusuka kwizindlu zokuhlala ukuya kwiindawo zokugcina iimpahla, iifektri, kunye nezakhiwo zorhwebo.
Funda ngokugqithisileyo