GB/T 39427-2020无损检测工业Ir192伽玛射线源尺寸测定方法标准
英文:Non-destructive testing—Testing method for determining the size of Ir192 industrial radiographic source GB/T 39427-20...
英文:Non-destructive testing—Testing method for determining the size of Ir192 industrial radiographic source GB/T 39427-20...