Kuthunyelwe ngo-2015-05-14 Okokuqala, ukubukeka:Ekukhanyeni kwemvelo kokukhanya, ngokubuka ngeso lenyama.Ithoni eyisisekelo ye-zinc chromate enamathela kufanele ibe grey, ingatholakala futhi ngokuguqulwa kweminye imibala, njengomnyama.I-Zinc chromate coating kufanele iqhubeke, ihlanganiswe engenamthungo, ...
Funda kabanzi