1
Chemicals used in industry and science; chemicals for the treatment, processing and purifying of water, drinking water or waste water; filtering materials (chemical preparations)
11
Apparatus for heating, steam generating, refrigerating, drying, ventilating, water supply and sanitary purposes; apparatus and installations for the treatment, processing, purifying and recycling of water, drinking water and waste water, the aforesaid apparatus and installations being in particular for the pharmaceutical industry, the food and drink industries, for the manufacture of wafers and microchips and for municipal drinking water and waste water treatment; apparatus and installations for the treatment of surface water and artesian water to create drinking water or ultra-pure water; apparatus and installations for purifying household and industrial waste water; apparatus and installations for water treatment using reverse osmosis processes; filters (parts of household and industrial installations); apparatus and installations for filtering liquids, in particular water, drinking water or waste water; parts for the aforesaid equipment, apparatus and installations
37
Installation, assembly, commissioning, maintenance, servicing and repair of apparatus and installations for the treatment, processing, purifying and recycling of water, drinking water and waste water
42
Scientific and technological services and research and design relating thereto; industrial analysis and research services; project development, planning and engineering in the field of the treatment, processing, purifying and recycling of water, drinking water and waste water