9 Scientific, electrical, optical, measuring, laboratory and test apparatus and instruments and parts therefore, namely, mass spectrometers, optical emission spectrometers, spectroscopy apparatus, spectrophotometers, gas and liquid chromatography apparatus, chromatography columns, centrifuges, incubators, biological safety cabinets, [ microscopes, ] fluorometers, assay diagnostic slides, electrophoresis analyzers, coolers and chillers, laboratory freezers, laboratory sample concentrators, electromechanical shakers, dispensers, [ readers and detectors for fluids in laboratory environments, ] microplate instruments, laboratory ovens, [ thermal cyclers, laboratory magnetic particle processors, ] gas detectors, radiation detectors, process gas analyzers, [ particle detectors, ] aerosol monitors, x-ray apparatus for inspecting liquids in containers, [ moisture analyzers, ] neutron generators, x-ray apparatus sources for scientific laboratory uses and for the measurement of weights and thicknesses of industrial articles, flow meters, sulfur analyzers, on-line cement, coal and minerals analyzers, electromagnetic interference simulators for testing electronic device, [ liquid level sensors, ] robotic liquid handling systems, viscometers and rheometers, coating gauges, density meters, pipettes, belt scales, check-weighers, metal detectors, PH electrodes, conductivity meters, dissolved oxygen meters, laboratory mixers and extruders, [ data acquisition and recording systems comprised of data scanner and graphic display and memory and programmable touch screen and power supply, ] computer software for use in data acquisition, analysis, and archiving in the field of laboratory research, computer software for use in laboratory instrument operation, charge-injection-device cameras, microscope slides and cover glasses for microscope slides, laboratory equipment for use in specimen preparation, namely, tissue processors; [ laboratory autoclaves, ] medical test kits comprised of analysis or calibration equipment to analyze and detect drugs and toxins and other chemicals in bodily fluids and tissues for clinical laboratory use; laboratory apparatus, namely, centrifuges