GB/T 39238-2020无损检测超声检测垂直于表面的不连续的检测标准
英文:Non-destructive testing—Ultrasonic testing—Examination for discontinuities perpendicular to the surface GB/T 39238-20...
英文:Non-destructive testing—Ultrasonic testing—Examination for discontinuities perpendicular to the surface GB/T 39238-20...