QB/T 1134-2017
首饰 银覆盖层厚度的测定 光谱法
Jewellery-Determination of silver coatings-Method of spectrometry
2017-01-09
QB/T 1135-2006
首饰 金、银覆盖层厚度的测定 X射线荧光光谱法
Jewellery-Measurement of gold and silver coating tickness-X-ray fluorescence spectrometric methods
2006-08-19
QB/T 1133-2017
首饰 金覆盖层厚度的测定 光谱法
Jewellery-Determination of gold coatings-Method of spectrometry
2017-01-09