Lighting installations; heating installations; Steam generating installations; cooking ovens; air cooling apparatus; cooling evaporators; cooling installations for water; Drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems; Turbine ventilators [ventilation apparatus]; Air-conditioning, air cooling and ventilation apparatus and instruments; Pipes being parts of sanitary facilities; air conditioners; Water purification units; Water purification installations; Waste water purification apparatus, installations and tanks; water pumps for water filtering units

General building contractor services; demolition work of building structures; carpentry; plastering work; painting and wallpapering; insulation services, namely, installation of building insulation; roofing services; tiling services, namely, tile installation; upholstering; installation of moisture control installations in buildings; scaffolding services; glass installation services; dredging services; bridge construction, road construction, railway construction; paving services, namely, brick paving; surfacing being laying of foundations; repair and maintenance of construction works; installation, maintenance and repair of lighting installations, lightning protection devices and grounding, telecommunications installations, heating, ventilation, cooling and sanitary installations and of industrial and machine installations; plumbing and installation of gas and water supplies; laying cables and pipelines; cleaning of structures, chimneys, vehicles and textile goods; repair or maintenance of clothing, electrical appliances and installations, tools, precision instruments, means of transport, mechanical equipment and devices for medical and orthopedic purposes, of photographic, projection and film equipment, upholstery, shoes and watch repair and maintenance; ship-building; demolition of structures; rental of machines and tools for the construction industry; laundry; construction, repairs, installation work of lighting, heating, steam generating, cooking, cooling, drying, ventilation and water supply equipment and sanitary installations, appliances and installations for the purification of drinking water and wastewater

Services of engineers, namely, development of machines for others; Engineering services for the construction of water treatment and purification plants, solid waste treatment plants and other municipal infrastructure facilities; Engineering services in the field of environmental compliance; Engineering services and consultation for the detection of contaminants in waste and water; bacteriological and laboratory testing in the field of biotechnology research and biomedical research services; preparation of expert reports by engineers or laboratory technicians in the field of environmental protection, water and waste treatment and renewable energies; research and development in the field of treatment and purification of air and water, soil remediation, waste processing, and energy recovery