GB/T 23901.5-2019 Non-destructive testing—Image quality of radiographs—Part 5: Determination of the image unsharpness and basic spatial resolution value using duplex wire-type image quality indicators (English Version)
2019GB/T 23901.5-2019 Non-destructive testing—Image quality of radiographs—Part 5: Determination of the image unsharpness and basic spatial resolution value using duplex wire-type image quality indicators
2009GB/T 23901.5-2009 Non-destructive testing.Image quality of radiographs.Part 5:Image quality indicators(duplex wire type).Determination of image unsharpness value