Main:
23.20 Manufacture of refractory products
Other:
28.41 Manufacture of metalworking machinery
28.91 Manufacture of machinery and equipment for metallurgy
24.45 Manufacture of other non-ferrous metals
24.54 Casting of other non-ferrous metals
25.61 Treatment and coating of metals
26.11 Manufacture of electronic components
72.19 Research and experimental development on other natural sciences and engineering
33.20 Installation and assembly of machinery and equipment