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TELEPHONE EQUIPMENT, NAMELY TELEPHONE SETS, TELEPHONE ANSWERING MACHINES, TELEPHONE SWITCHBOARDS, AND TELEPHONE MODEMS, CARRIER WAVE EQUIPMENT, NAMELY RADIOS, RADIO TRANSMITTING AND COMMUNICATIONS ANTENNAS, AND SHORT WAVE TRANSMITTERS AND RECEIVERS, MICROWAVE COMMUICATION EQUIPMENT, NAMELY OSCILLATORS AND WAVE METERS, TELEGRAPH EQUIPMENT, NAMELY TELEGRAPH CARRIER EQUIPMENT, TELEGRAPH SWITCHBOARDS, AND TELEGRAPH OFFICE SWITCHING EQUIPMENT, POWER SUPPLY UNITS AND EQUIPMENT, NAMELY ELECTRIC POWER TRANSFORMERS AND POWER LINE VOLTAGE REGULATORS, SEMICONDUCTOR DEVICES, NAMELY TRANSISTORS, DIODES, PHOTODIODES, LASER DIODES, THYRISTORS, INTEGRATED CIRCUITS, AND PERSONAL COMPUTERS, SIGNALLING AND GUIDANCE EQUIPMENT, NAMELY ELECTRIC RAILWAY, HIGHWAY, AND TRAFFIC SIGNALS, MARINE HORNS, AND ELECTRIC SIRENS FOR MARINE AND LAND VEHICLES, REMOTE CONTROL AND TELEMETERING EQUIPMENT, NAMELY RADIATION AND NUCLEAR INSTRUMENTS, NAMELY, GEIGER COUNTERS, ELECTRON TUBES, NAMELY, TRANSMITTER ELECTRON TUBES, RECEIVER ELECTRON TUBES, POWER TUBES, TELEVISION PICTURE TUBES, AND COMPUTER CATHODE RAY TUBES, CAPACITORS, RESISTORS, POTENTIOMETERS, ELECTROACOUSTIC DEVICES, NAMELY SPEAKERS, PHOTOGRAPHIC APPLIANCES AND EQUIPMENT, NAMELY, STILL AND MOTION PICTURE CAMERAS, MICROFILM CAMERAS, AND PHOTOGRAPHIC ENLARGERS, INDUSTRIAL X-RAY MACHINES AND TUBES, OPTICAL INSTRUMENTS, NAMELY MICROSCOPES AND TELESCOPES, THERMOMETERS, CALORIMETERS, PRESSURE GAUGES, LIQUID, GAS, AND MAGNETIC FLOW METERS, FLUID VELOCITY METERS, GAS PRESSURE GAUGES, ELECTRIC TIMER SWITCHES, DYNAMOMETRIC TESTERS, ELECTRICAL INSTRUMENTS AND METERS, NAMELY ELECTRIC WATT-HOUR METERS, AMMETERS, ELECTRICAL FREQUENCY METERS, OHMMETERS, AND VOLTMETERS