GB/T 23901.1-2019 Non-destructive testing—Image quality of radiographs—Part 1: Determination of the image quality value using wire-type image quality indicators (English Version)
2019GB/T 23901.1-2019 Non-destructive testing—Image quality of radiographs—Part 1: Determination of the image quality value using wire-type image quality indicators
2009GB/T 23901.1-2009 Non-destructive testing.Image quality of radiographs.Part 1:Image quality indicators (wire type).Determination of image quality value