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[ INDIRECT HEATERS FOR USE IN OIL FIELDS; HEAT EXCHANGE APPARATUS FOR THE EXCHANGE OF HEAT BETWEEN FLUIDS, SUCH AS GAS AND AIR, AND REGENERATIVE AND RECUPERATIVE HEATERS AND PARTS THEREOF; INCINERATORS AND PARTS THEREOF; FANS; ] NUCLEAR STEAM PLANTS COMPRISING REACTOR VESSELS, ASSOCIATED CORE STRUCTURALS, INTERNAL SHIELDING, STEAM GENERATORS, PUMPS, CONDENSORS, PRESSURIZERS, FUEL PORTS, PIPING, FUEL ASSEMBLIES, CONTROL RODS, CONTROL ROD DRIVE MECHANISMS, AND RADIOACTIVE WASTE HANDLING EQUIPMENT COMPRISING ION EXCHANGERS, FILTERS AND EVAPORATORS, AND BORON WASTE HANDLING EQUIPMENT COMPRISING STORAGE TANKS, FILTERS, ION EXCHANGERS AND EVAPORATORS; [ FOSSIL-FIRED BOILERS AND PARTS THEREOF; INDUSTRIAL AND MARINE BOILERS AND PARTS THEREOF; BURNERS FOR BURNING FUEL ]