7
Suction machines and installations (for industrial purposes); Dust removing installations (included in class 7); Parts of the aforesaid goods
9
Transformers, in particular frequency transformers; Electric and electronic controllers, in particular for suction machines and installations, dust removing installations, installations and apparatus for extracting and/or purifying polluted air and for air-handling apparatus and installations
11
Installations and apparatus for extracting and/or purifying polluted air, in particular air polluted with dust and/or shavings; Air-handling apparatus and installations, in particular heating, ventilating, cooling and air-conditioning apparatus, air handlers, drying apparatus, heating boilers, air reheaters, stoves [heating apparatus], apparatus for generating and/or distributing steam, hot water and hot air, filter apparatus, heat pumps, refrigerating machines, heat exchangers, solar collectors, domestic water systems; Parts of the aforesaid goods
37
Cleaning and installation, maintenance and repair relating to the following goods: suction machines and installations, dust removing installations, installations and apparatus for extracting and/or purifying polluted air and for air-handling apparatus and installations, and parts for the aforesaid goods