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exhaust system components for combustion engines for air and water vehicles; namely, boats and aircraft and for excavators, graders and vehicle-borne cranes; namely, metal tubes, sound absorbers, exhaust gas catalyst bodies and soot filters, tailpipes and exhaust pipes sold both alone and together with the associated housing and complete exhaust systems comprising some or all of the above

ventilating, circulating, and exhaust fans for internal and external use in buildings and heat exchangers associated with such fans; fuel burning heaters for land, air and water combustion-powered vehicles; namely, automobiles, trucks, buses, motor homes, vans, rail vehicles, excavators, graders, vehicle-borne cranes, and aircraft, such heaters operating independently of the vehicle engine; constructionally bound parts of said heaters and of the associated heat carrier circuit

exhaust system components for combustion engines for land vehicles; namely, automobiles, trucks, buses, motor homes, vans, rail vehicles; namely, metal tubes, sound absorbents, exhaust gas catalyst bodies and soot filters, tail pipes and exhaust pipes sold both alone and together with the associated housing and complete exhaust systems comprising some or all of the above