ICS19.100J04中华人民共和国国家标准GB/T19938-2005/IS02504:1973无损检测焊缝射线照相和底片观察条件像质计推荐型式的使用Non-destructive testing-Radiography of welds and viewing conditions forfilms-Utilization of recommended patterns of image quality indicators(ISO 2504:1973,Radiography of welds and viewing conditions forfilms-Utilization of recommended patternsof image quality indicators(I.Q.I.)IDT)2005-09-19发布2006-04-01实施中华人民共和国国家质量监督检验检疫总局中国国家标准化管理委员会发布
