Home / Standards / GBT 23901.5-2019 GBT 23901.5-2019 Non-destructive testing — Image quality of radiographs — Part 5: Image unsharpness measurement using duplex wire type image quality indicators 无损检测 射线照相检测图像质量 第5部分:双丝型像质计图像不清晰 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A