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GB 11887-2012 English PDF (GB11887-2012)

GB 11887-2012 English PDF (GB11887-2012)

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GB 11887-2012: Jewellery -- Fineness of precious metal alloys and designation [including MODIFICATION 1]
This Standard specifies fineness range 1) of noble metals in jewellery, mark for jewellery, test method and designation method for precious metal jewellery. This Standard is applicable to jewelleries produced and distributed in jewellery industry and at home (China).

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