X-ray spectrometers not for medical use, being laboratory equipment; computer software for use in calculating data, producing reports of readings, scientific analysis of minerals, alloys, semiconductors, dust particles, solids particles and all samples analyzable in vacuum for X-ray spectrometers; downloadable computer software for use in calculating data, producing reports of readings, scientific analysis of minerals, alloys, semiconductors, dust particles, solids particles and all samples a...