Scientific apparatus, instruments and devices for research- development-or investigatory purposes and laboratory equipment, namely, microscopes, plastic, rubber and elastomer closures for laboratory vessels, residual gas analyzers, flow-based analyzers providing cell and particle analysis, detection, or counting for scientific, laboratory, and general research uses, liquid analyzers, pipette racks, thermometers, test tubes, spectroscopes, incubators, vessels, namely, flasks for laboratory use...