6
Common metals and their alloys; building materials of metal, in particular closing elements for shutting-off wall and ceiling holes, mainly comprising a sleeve and preferably a locking element of metal; transportable buildings of metal, in particular coverings for cross-grained timber on beams and posts of sheet metal; materials of metal for railway tracks; non-electric cables and wires of common metal; ironmongery, small items of metal hardware, in particular wire clamps and band clamps; pipes of metal, in particular flexible, semi-flexible and rigid pipes, including for installation purposes and stainless steel pipes, pipework systems and aerating pipes for oil tanks; goods of metal, in particular connection pieces for pipes in the form of sleeves, bushings, flanges, flanges sleeves, flanged sockets, pipe and tube sections, including tubular sound dampers being parts for ventilating installations, chimneys and flue gas systems being plug and socket connection systems, weatherproof gratings, cables and wires of metal (not for electric purposes), the aforesaid goods in particular for installation in buildings
19
Building materials (non-metallic), in particular flexible pipes, including tubular sound dampers as parts for ventilating installations, chimneys and gas pipes, weatherproof gratings, flue gas pipes, chimney components, in particular including components for ventilating and air conditioning technology; pipes (not of metal), in particular pipe fittings, in particular for ventilating technology, for measuring and regulating flow, outlets and air distributors for ventilating installations and accessories therefor, namely heat shrunk bands, wire clamps, band clamps, flexible, semi-flexible and rigid pipes and tubes, in particular for installation purposes, and connection pieces for pipes in the form of sleeves, bushings, flanges, flange sleeves, flanged sockets, pipe and tube sections; non-metallic transportable buildings
42
Engineering services, technical design, technical planning and technical consultancy in the fields of ventilating, flue gas, plug and socket connection systems, and low-energy and passive-house technology; scientific and industrial research; computer programming