Ucingo oluqhelekileyo lwentsimbi lunocingo olumnyama, ucingo lwentsimbi kunye nocingo lwentsimbi olusetyenzwayo, yintoni ucingo olumnyama olufakwe amazinki?Yintoni inkqubo yokuvelisa ucingo olumnyama olufakwe igalvanized?Zeziphi izinto eziqhelekileyo ezisetyenziswayo?Izinto eziphambili zocingo olumnyama yintsimbi, icobalt, i-nickel, ubhedu, ikhabhoni, i-zinc kunye...
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