美利体育登录入口官网:EN ISO 19232-5:2018 无损检验.辐射摄影的图像质量.第5部分:图像质量显示器(双线型).图像不清晰值的测定
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