9 Scientific, weighing and measuring apparatus and instruments, namely, spectrometers, mass spectrometers and particle charge measuring instruments and structural parts therefor; Scientific, industrial and laboratory apparatus and instruments, namely, spectrometers, mass spectrometers, particle charge measuring instruments, probes, accelerator plates in the nature of multimedia accelerator boards, magnets, centrifugal metering pumps, ultrasonic flaw detectors, computer screens, video monitors, lasers not for medical purposes applicable to the physical, chemical, biological, geological and biochemical analysis of the environment, solids, liquids, gases and particulates; scientific, industrial and laboratory apparatus and instruments, namely, spectrometers, mass spectrometers and particle charge measuring instruments for counting, sizing, classifying, differentiating and identifying particles in solids, liquids or gases; particle charge measuring instruments; spectrometers; mass spectrometers; downloadable computer software for use in relation to operating spectrometers, mass spectrometers and particle charge measuring instruments; structural parts and fittings for the aforesaid goods