
BS ISO 3160-2 - WATCH-CASES AND ACCESSORIES - GOLD ALLOY COVERINGS - PART 2: DETERMINATION OF FINENESS, THICKNESS, CORROSION RESISTANCE AND ADHESION
出版:British Standards Institution

专家解读视频
BS ISO 3160-2 - WATCH-CASES AND ACCESSORIES - GOLD ALLOY COVERINGS - PART 2: DETERMINATION OF FINENESS, THICKNESS, CORROSION RESISTANCE AND ADHESION
出版:British Standards Institution
专家解读视频