21 ELECTRONIC AND MICROWAVE COMPONENTS, SUBSYSTEMS AND SYSTEMS-NAMELY, ADAPTERS, ATTENUATORS, TUBE MOUNTS, COUPLERS, MIXERS, PROBES, DETECTORS, ISOLATORS, POWER SUPPLIES, PHASE SHIFTERS, GENERATORS, TUNERS AND TERMINATIONS
26 BOLOMETERS, THERMISTORS, FREQUENCY METERS, RADAR TEST SETS, RADIATION MONITORS, DUMMY LOADS, IMPEDANCE METERS, POWER METERS, THERMOCOUPLES, OSCILLATORS AND REFLECTOMETERS