Home / Standards / GB/T 39427-2020 GB/T 39427-2020 Active Non-destructive testing—Testing method for determining the size of Ir192 industrial radiographic source 无损检测 工业Ir192伽玛射线源尺寸测定方法 Standard Type GBT ICS 19.100 CCS J04 Status 现行 Issue Date 2020-11-19 Implementation 2021-06-01 Responsible Dept 国家标准委 Drafting Unit N/A