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Component parts for liquid chromatography and other analytical, synthetic, and sample preparatory techniques, namely, guard columns, plastic tubes and stainless steel tubes, capillaries, cartridges, discs containing chemically interactive and reactive solid media in particulate or monolithic form for use in chromatography; guard columns; solid-phase extraction supports, namely, silica and polymer packing materials; precolumns; trapping columns; filters, plastic and stainless steel tubing, valves, namely, check valves, outlet cartridge check valves, priming valves, injection valves, and maintenance components, namely, couplers, hand tight fittings, stainless steel fittings, plugs, connectors, couplers, ferrules, nuts, screws, seals, rotors, stators, pump heads, lamps, pistons, flow-back through pressure regulators, bushings, all of the foregoing component parts for instruments designed to perform liquid chromatography and other analytical, synthetic, and sample preparatory techniques, and for instruments designed to perform fluid transfer in scientific instruments, said instruments for use by those working in the fields of liquid chromatography (LC), mass spectrometry (MS), and liquid chromatography combined with mass spectrometry (LC/MS)
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