X-Ray tubes for non-medical use; industrial X-ray systems for non-medical use, consisting of X-ray tubes, industrial X-ray apparatus in the nature of testing equipment for determining industrial flaws X-ray generators and electronic X-ray controllers for non-destructive testing, for evaluating and diagnosing apparatus, for castings [ as well as weld seams, ] and for mechanical, electromechanical and electronic apparatus and components, for maintenance purposes and for use in aeronautical engi...