
Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay) (ISO 11426:2014, Corrected version 2014-12-15)
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay) (ISO 11426:2014, Corrected version 2014-12-15)
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻