Home / Standards / GB/T 16921-1997 GB/T 16921-1997 Abolished Measurement of metallic coating thickness--X-ray spectrometric methods 金属覆盖层 厚度测量 X射线光谱方法 Standard Type GBT ICS 25.220.40 CCS A29 Status 废止 Issue Date 1997-07-25 Implementation 1998-02-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会