Home / Standards / GB/T 20018-2005 GB/T 20018-2005 Active Metallic and non-metallic coatings -- Measurement of thickness -- Beta backscatter methods 金属与非金属覆盖层 覆盖层厚度测量 β射线背散射法 Standard Type GBT ICS 25.220.20 CCS A29 Status 现行 Issue Date 2005-10-12 Implementation 2006-04-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会