Machines included in class 7 for collecting, exhausting, controlling or filtering dust, powdery materials or waste products, machines and apparatus in this class for air cleaning and air purifying and for the handling and conveying of materials, mist collectors, fume, gas and smoke extracting and exhausting machines, filters in this class, and parts and fittings included in Class 7 for all the aforesaid goods

Vacuum cleaners for industrial use, control apparatus and instruments in class 9, and parts and fittings included in class 9 for all the aforesaid goods

Installations and apparatus for air purifying and air cleaning, installations and apparatus for collecting, exhausting, controlling or filtering dust, powdery materials or waste products, electrostatic precipitators, filters, and parts and fittings included in class 11 for all the aforesaid goods