Apparatus for recording, transmission or reproduction of images; x-ray apparatus for industrial purposes; x-ray tubes, not for medical purposes; x-ray tube having an x-ray source with liquid metal jet anode, not for medical purposes; anodes in the form of a jet of liquid metal; x-rays producing apparatus and installations, not for medical purposes; calibration devices for calibrating industrial x-ray apparatus in the nature of test and measurement equipment; computer software for controlling ...