[ ELECTRICAL SYSTEMS ANALYZERS; IGNITION SYSTEMS ANALYZERS; ENGINE ANALYZERS; [ CHROMATOGRAPHS; POLARIMETERS; SPECTROMETERS; VISCOSIMETERS; DISSOLVED OXYGEN AND THERMAL CONDUCTIVITY MEASURING DEVICES; VACUUM GAGES; TOTAL HYDROCARBON AND TOTAL HALOGEN ANALYZERS; ] RF WATTMETERS; FIBER OPTICS; TELEMETRY APPARATUS; [ METEROLOGICAL INSTRUMENTS--NAMELY, RADIOSONDES, RAIN GAGES, MICROBAROGRAPHS, THERMOMETERS, PSYSCROMETERS, TEMPERATURE AND HUMIDITY INDICATORS AND RECORDERS; ] AIR VELOCITY AND DIRECTION METERS; DOSIMETERS; NUCLEAR RADIATION DETECTORS; [ ELECTROSTATIC AIR SAMPLING DEVICES; HIGH VACUUM PUMPS, CHAMBERS, AND FURNACES AND PARTS AND ACCESSORIES THEREFOR; BAROMETERS; ] NUCLEAR DENSITY GAGES; [ MOLECULAR DISTILLATION EQUIPMENT; ELECTRONIC COUNTERS; ] AIR SPEED AND MACH NUMBER INDICATORS; [ AUTOMATIC FLIGHT SYSTEMS; ] AIRPLANE AND ENGINE INSTRUMENTS FOR INDICATING TEMPERATURE, PRESSURE, CONTROL POSITION, AND OTHER OPERATING CONDITIONS; FLIGHT AND NAVIGATION INSTRUMENTS; GYROSCOPIC APPARATUS; PRECISION COMPONENTS FOR SERVO MECHANISMS AND [ COMPUTING EQUIPMENT; ELECTRONIC COMPUTERS;] [ FLUID CONTENT GAGES; FLUID FLOWMETERS; ] BAROMETRIC ALTIMETERS;] [ TACHOMETERS; ] ACCELEROMETERS [ ; PROXIMITY FUSES;] [ PNEUMATIC, ELECTRIC, ELECTROMECHANICAL, X-RAY, OPTICAL MICROWAVE GAGES; AUTOMATIC POSITION READOUT DEVICES; AUTOMATIC GAGING AND SORTING EQUIPMENT; PHOTOGRAMMETRIC DEVICES; INFRARED SCANNING AND RECORDING DEVICES; BEARING QUALITY TESTERS; COMPARATOR GAGES; MATERIAL TESTING EQUIPMENT-NAMELY, COMPRESSION, CRIMPING, CURING, ELASTOMETER AGING, ELONGATION, FATIGUE, AND FLEXING TESTERS; FILM THICKNESS GAGES; ] [ INFEROMETERS;] [ MICROSCOPES; POROSITY MEASURING DEVICES; PROFILE ROUGHNESS AND ROUNDNESS GAGES; STRAIN, SURFACE TESTERS; TEAR, TENSILE, TORSION, TWIST VISCO-ELASTICITY AND SLIDE FASTENER TESTERS; OCEANOGRAPHIC INSTRUMENTS-NAMELY, WAVE GAGES AND RECORDERS; DEPTH GAGES AND RECORDERS; WATER CURRENT SPEED AND DIRECTION METERS AND RECORDERS; WATER TEMPERATURE SENSORS AND RECORDERS; FUEL QUALITY MONITORING DEVICES; FILTER CONDITION INDICATING DEVICES ]