Chromatography apparatus for laboratory use; fittings and connections for use in the field of chromatography, namely, fittings and connections for chromatography apparatuses for laboratory use; gas chromatography apparatus for laboratory use; plug connectors; fittings and accessories specially adapted for use with chromatography apparatus for laboratory use, namely, press-fit ferrules and lock-ring connectors

Pressure fittings and ferrules for laboratory equipment and apparatus in the nature of DNA sequencers, tubing assemblies therefor and sipper probes apparatus, for laboratory use