11 SF6 GAS TRANSFER CARTS FOR RECLAIMING AND REPURIFYING GAS IN CIRCUIT BREAKERS BY UTILITY COMPANIES DURING MAINTENANCE OPERATIONS; HEAT EXCHANGERS USED IN REMOVING HEAT FROM ENGINES, COOLING OILS FOR JET ENGINES, AND COOLING ELECTRONIC EQUIPMENT; HONEYCOMB PANELS FOR USE IN AIRCRAFT; DEMINERALIZERS; AND COLD PLATES USED IN COOLING ELECTRONIC COMPONENTS SO THAT THEY OPERATE RELIABLY