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Titolo: GB 11887-2008 jewelry precious metal purity ...
Condizione libro: New
Paperback. Pub Date: November 2010 Pages: 69 Language: English Publisher: Standards Press of China GB 11887-2008 the Publicizing textbook is the basis of precious metal jewelry standard. since first enacted in 1989. the precious metal jewelry products for domestic production. sales. use and quality supervision provides a unified technical basis is important to regulate the market. the effective protection of the interests of consumers. With the social progress and technological development. people's living standards and income is increasing as a high-end consumer products. precious metal jewelry. exquisite style. ever changing. for the wearer to play the role of decorative landscaping. you can also hedge against inflation . value-added. certain economic benefits. the proportion of people's daily consumption is also growing. In recent years. consumer awareness and self-protec...
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