1. Inokufikelela kwiimfuno ezihlukeneyo zokhuseleko lweemveliso.Iingxowa zokupakisha ukutya azinakwanelisa kuphela iimfuno zesithintelo somphunga wamanzi, igesi, igrisi, izinyibilikisi eziphilayo kunye nezinye izinto, kodwa zikwahlangabezana neemfuno zabathengi, ezinje nge-anti-rust, anti-corrosion, anti-electromagnetic ra...
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