Installations and apparatus all for air purifying, air conditioning and ventilating; installations and apparatus, included in class 11, all for heating, cooling and for drying; dust removing installations for industrial purposes; humidifiers; and de-humidifiers, all for use in air conditioning and ventilating; filters (not being parts of engines, motors or of machines and not for photographic, medical or scientific purposes); parts and fittings included in class 11 for all the aforesaid goods

Machines for industrial use for collecting, controlling or filtering dust, powdery materials or waste products, and parts and fittings for such machines included in class 7