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VALVES [ AND CONNECTORS ] FOR USE IN VACUUM AND HIGH-VACUUM UNITS AND SYSTEMS

TESTING, DEMONSTRATING AND MEASURING APPARATUS FOR TEACHING PHYSICS, CHEMISTRY AND LIKE SCIENCES, AND TESTING AND MEASURING APPARATUS FOR LABORATORY USE-NAMELY, VACUUM AND PRESSURE GAUGES, [ MANOMETERS, HYGROMETERS, THERMOMETERS, (( ACOUSTIC, OPTIC AND )) ELECTRICAL MEASURING INSTRUMENTS, ] (( VACUUM AND HIGH-VACUUM MEASURING INSTRUMENTS, [ VAN DE GRAAF ACCELERATORS AND LINEAR ACCELERATORS; NUCLEAR LABORATORY APPARATUSES; ] CRYOGENIC UNITS AND PARTS THEREOF ))

VACUUM AND HIGH-VACUUM APPARATUSES-NAMELY, (( VACUUM AND HIGH-VACUUM UNITS, VAPOR COATING APPARATUSES, )) VACUUM AND HIGH-VACUUM PUMPS AND PUMP SYSTEMS, [ DIFFUSION PUMPS, ] ROTARY PUMPS [ , AND VAPOR PUMPS ]

[ VACUUM AND HIGH-VACUUM APPARATUSES-NAMELY, DISTILLATION PLANTS, (( VACUUM FURNACES, METAL DEGASSING PLANTS, DRYING AND FILLING PLANTS, DEGASSING AND IMPREGNATION PLANTS, FREEZE-DRYING APPARATUS FOR DRYING ORGANIC SUBSTANCES SUCH AS PHARMACEUTICALS, FOODSTUFFS; BLOOD PLASMA AND SERUM, TISSUE MATERIAL, AND THE LIKE; FREEZERS AND DRYERS FOR USE WITH FREEZE-DRYING APPARATUS )) ]