Scientific, measuring and detecting apparatus and instruments, namely, spectrometers, X-ray fluorescence analysers and spectrometers, diffractometers, X-ray diffractometers and wafer analysers, neutron activation analysers, pulsed fast and thermal neutron activation analysers; X-ray detecting apparatus and instruments; X-ray measuring, detecting and monitoring instruments, indicators and controllers not for medical purposes; X-ray detectors not for medical purposes; analytical apparatus for u...