[ Particle accelerators; magnets; electromagnetic coils; ] testing apparatus not for medical purposes, namely, electron probes and ion probes; apparatus and instruments for astronomy, namely, analytical instruments in the nature of analyzers for measuring meteorites; [ regulating apparatus, namely, apparatus for regulating electric current; ] detectors, namely, [ charged particle detectors, ] atom detectors [ and photon detectors ] ; [ vacuum gauges; ] data-processing apparatus, namely, electronic hardware in the nature of data processors [ and programmable logic controllers dedicated to analytical instruments ] ; ionization apparatus, not for the treatment of air, namely, ion sources in the nature of duoplasmatrons field emitters [ and plasma radio-frequency sources ] dedicated to particle accelerators, electron and ion probes; computer software for analytical instruments for use in analytical techniques data processing; measuring instruments, namely, material analytical instruments in the nature of electron microscopes and mass spectrometers; precision measuring apparatus, namely, microanalysis apparatus in the nature of analyzers; microscopes; [ optical apparatus and instruments, namely, channel plate amplifier, light amplifier and laser; ] apparatus and instruments for physics, namely, electron beam and ion beam instruments in the nature of analyzers; X-rays producing apparatus and installations, not for medical purposes, namely, [ X-ray source for X-ray photoelectron spectroscopy, ] X-ray source for electron spectroscopy for chemical analysis and X-ray monochromatic applications; [ protection devices against X-rays, not for medical purposes, namely, flask, coffin and cask; ] spectrograph apparatus, namely, mass spectrometer [ and electron spectrometers; spectroscopes ]