7
Exhaust gas purification systems for motors and engines; Anti-pollution devices for motors and engines; Pumps [machines]; Exhausts; Regulators for machines, Regulators for engines; Waste gas conduits [parts of machines]; Catalytic converters for the exhaust gases of internal combustion engines; Exhaust systems for vehicles; Ship exhaust systems; Expansion boxes for exhausts; Catalytic converters; Steam condensers [parts of machines]
11
Steam generators; Heating apparatus; Burners; Boilers; Electric central heating boiler systems; Radiators for central heating installations; Boilers for use in heating systems; Industrial boilers; Heating armatures; Heating units; Heating boilers; Heating installations; Heating frames; Heating elements; Heat exchangers, other than parts of machines; Heat pumps; Heat regenerators; Heat accumulators; Filters for waste gas purification; Coils for heating; Boiler pipes [tubes] for heating installations; Heating apparatus for solid, liquid or gaseous fuels; Heaters for vehicles; Steam boilers, other than parts of machines; Air purifying apparatus and machines; Coils [parts of distilling, heating or cooling installations]; Steam generating installations; Pressure vessels; Heating pipes; Fans for exhaust extractors; Heat exchangers for the removal of exhaust gases; Industrial treatment plants for handling exhaust gases