72.19.Z - Other research and experimental development on natural sciences and engineering
26.11.Z - Manufacture of electronic components
26.30.Z - Manufacture of communication equipment
26.51.Z - Manufacture of instruments and appliances for measuring, testing and navigation
27.12.Z - Manufacture of electricity distribution and control apparatus
27.90.Z - Manufacture of other electrical equipment
71.20.B - Inspection and issuance of opinions on the technical condition of chimneys and ventilation ducts
74.10.Z - Specialised design activities
74.90.Z - Other professional, scientific and technical activities not elsewhere classified