无损检测仪器 1MV以下X射线设备的辐射防护规则 第3部分:450kV以下X射线设备辐射防护的计算公式和图表
Non-destructive testing instruments—Radiation protection rules for the technical application of X-ray equipment up to 1MV—Part 3: Formulas and diagrams for the calculation of radiation protection for X-ray equipment up to 450kV