72.19.Z - Other research and experimental development on natural sciences and engineering
26.51.Z - Manufacture of instruments and appliances for measuring, testing and navigation
27.90.Z - Manufacture of other electrical equipment
28.21.Z - Manufacture of ovens, furnaces and permanent household heating equipment
28.25.Z - Manufacture of non-domestic air conditioning equipment
28.29.Z - Manufacture of other general-purpose machinery n.e.c.
28.99.Z - Manufacture of other special-purpose machinery n.e.c.
71.12.Z - Engineering activities and related technical consultancy
71.20.B - Inspection and issuance of opinions on the technical condition of chimneys and ventilation ducts
74.90.Z - Other professional, scientific and technical activities not elsewhere classified