71647000
May 14, 1953
Feb 1, 1955
AIR CONDITIONERS; PORTABLE UNITS HAVING POWER DRIVEN FANS FOR COOLING AIRCRAFT ON THE GROUND; PORTABLE UNITS FOR HEATING AIRCRAFT CABINS AND OTHER ENCLOSURES ON THE GROUND; HEAT EXCHANGERS- NAMELY, AFTERCOOLERS, INTERCOOLERS, CABIN HEATERS, AFTERCOOLERS AND HEATERS, REGENERATIVE HEAT EXCHANGERS, EXHAUST HEATERS, OIL-TO-FUEL HEAT EXCHANGERS; OIL COOLERS; AND OIL COOLER REPAIR KITS INCLUDING SPARE TUBES AND FERRULES, AND SPECIAL TOOLS FOR REMOVING AND REPLACING THE SAME
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