2. Maintenance services
2.4 Maintenance contracts
2.5 Modernizing, fundamental improvements
2.6 Planning and consulting

5. Equipment, spare parts and accessories
5.7 Fans
5.9 Filters

7. Surface treatment and corrosion prevention
7.1 Techniques and procedures
7.2 Equipment and materials

10. Plant area and environmental technology
10.3 Air protection
10.6 Machines, equipment and methods

14 Cleaning and sanitation
14.2 Cleaning systems, equipments and machines

19. Mining industry equipment and services
19.10 Machinery and equipment
19.15 Crushing plants, crushers and related equipment and services

22. Environmental technology
22.2 Air quality protection
22.10 Cleaning and cleansing

29. Industrial services
29.1 Maintenance
29.9 Designing and consultation
29.13 Environmental technology