
Watch-Cases And Accessories - Gold Alloy Coverings - Part 2: Determination Of Fineness, Thickness, Corrosion Resistance And Adhesion
出版:Nederlands Normalisatie Instituut

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Watch-Cases And Accessories - Gold Alloy Coverings - Part 2: Determination Of Fineness, Thickness, Corrosion Resistance And Adhesion
出版:Nederlands Normalisatie Instituut
專家解讀視頻