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Copper-nickel-zinc Alloy Sawb
Taw qhia Nickel Silver Alloys, tseem hu ua tooj liab-nickel-zinc Alloy Sawb, 65-15-20 feem, uas muaj cov qauv zoo, zoo corrosion thiab tarnish-ua hauj, thiab cov hlau no muaj cov xim zoo li nyiaj.Cov Khoom Siv Siv dav siv hauv kev tsim khoom ntawm cov khoom siv, elastic ...
