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Copper-nickel-zinc Alloy hlau
Taw qhia Cov tooj liab-nickel-zinc alloy hlau muaj cov qauv zoo thiab tuaj yeem rov ua dua rau lwm cov duab rau kev siv tom ntej.Nyob rau tib lub sijhawm, cov tsos ntawm cov hlau no yog silvery dawb, uas muaj qhov zoo nkauj zoo nkauj, thiab nws tus kheej corrosion kuj thiab discoloration kuj tuaj yeem ua rau nws ruaj khov ntawm cov xim qub thaum siv.Cov khoom ...
