1. Maintain central and local refrigeration system for office
2. Maintenance of central cooling system, factory floor
3. Maintaining central, local cooling system for buildings
4. Maintenance of central cooling system, local laboratory, hospital
5. Maintenance of ventilation system, waste water treatment
6. Maintenance of trucks, tractors, forklifts
7. Maintenance of the boiler system
8. Maintaining equipment for production of industrial parks
9. Maintenance of coffee production equipment: sublimation and spray drying.
10. Maintenance of fire fighting system