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SPACE RESEARCH AND SURVEILLANCE SATELLITES, COMPUTER MEMORY DEVICES AND MEMORY SYSTEMS, STRAIN GAUGES AND DEFLECTION GAUGES, RADAR SYSTEMS, GUN FIRE CONTROL SYSTEMS, NUCLEAR REACTORS AND ISOTOPE POWER UNITS, AND GAUGES, TESTERS AND TEST HARNESSES FOR FUEL, HYDRAULIC, OXYGEN AND ELECTRICAL SYSTEMS NOT INCLUDING TESTERS AND TEST HARNESSES FOR INSTALLING OR SERVICING AUTOMOTIVE PRODUCTS, AND PARTS AND ACCESSORIES THEREFOR