Lamps and luminaires and their components; specular reflectors for lighting fixtures; light distribution appliances; heaters, infrared lamps, ribbed tubular heaters, heating conductors, heating mats, electric underfloor storage heating systems; heat pumps; nuclear reactors; steam generators, driers, refrigerators and ventilators and their components and fittings; sintering, smelting, brazing and combustion furnaces; steam condensers; refuse incineration equipment and plants; thermal waste processing systems, particularly comprising pyrolysis drums, high-temperature combustion chambers, flue gas cleaning equipment and separators for the carbonized waste; filters and catalytic converters for flue gas cleaning and for the gas-water cycles of power plants; environmental engineering equipment and systems, including water treatment and desalination plants; landfill gas removal systems including gas utilization and cleanup systems; leachate treatment plants; systems for the production of cooling, service/domestic and ultra-high purity water; waste heat recovery systems; electrical household and kitchen appliances particularly ovens, cookers, baking ovens, friers, grills, toasters, defrosters and hotplates, microwave ovens; electric grease filter sets and extractor hoods; pressure cookers, ovens, hotplates, immersion heaters, electric drink makers; hand mixers; boilers, storage water heaters, continuous-flow water heaters; air humidifiers; upright and chest-type refrigerators and freezers; electric ice-makers; driers such as electric hand driers and tumble driers; electric devices for personal hygiene and beauty care such as hair driers, heat lamps, hot-air apparatus; ventilators, fans; heaters and air-conditioning systems devices and ionizer devices to improve air quality (also for motor vehicles); appliances for steam, air and water piping installations and sanitary installations such as mixer batteries, safety valves, pressure reducers

Operation and administration of telecommunication systems, networks and of pertinent facilities and parts thereof

Installation, fitting, maintenance and repair of telecommunication equipment and networks

Advisory services for the installation and operation of telecommunication systems and networks; development and design engineering of telecommunication and information processing services and facilities and of telecommunication networks; planning and design engineering of telecommunication systems, networks and of pertinent facilities and parts thereof; development, generation and leasing of data processing programs; leasing of telecommunication appliances, devices and networks

Installation, fitting, maintenance and repair of telecommunication equipment and networks

Operation and administration of telecommunication systems, networks and of pertinent facilities and parts thereof

Advisory services for the installation and operation of telecommunication systems and networks; development and design engineering of telecommunication and information processing services and facilities and of telecommunication networks; planning and design engineering of telecommunication systems, networks and of pertinent facilities and parts thereof; development, generation and leasing of data processing programs; leasing of telecommunication appliances, devices and networks