37 Installation of apparatus and infrastructure in the sector of electricity generation, namely, installation of electrical power plants; construction and repair in the sector of electricity generation, namely, construction and repair of electrical power plants; construction of plants, namely, electric power plants; construction of buildings; technical management, namely, maintenance of electricity generation installations; technical advice regarding the construction, maintenance, cleaning, servicing, and repair of electricity generation installations; construction of treatment plants and vitrification units for hazardous waste, asbestos, toxic ash, sanding dust, polluted soil, sludge from purification stations, mineral toxic waste and hospital waste; construction of installations for reducing the volume of hazardous radioactive waste; construction of installations for the recovery of metals; construction of installations for the gasification of coal and lean coal; construction of installations for purifying, processing, refining and overheating chemical dry-type gas; on-site removal of asbestos and asbestos waste; operations for removing asbestos from specific equipment, fire doors, metal joinery, boilers and tanks; technical management, namely, maintenance of waste treatment installations; installation of apparatus and infrastructure in the waste treatment sector, namely, installation of equipment and installations for processing and recycling of hazardous waste, asbestos, toxic ash, sanding dust, polluted soil, sludge from purification stations, mineral toxic waste and hospital waste; installation of equipment and installations for reducing the volume of hazardous radioactive waste; installation of equipment and installations for the recovery of metals; installation of equipment and installations for the gasification of coal and lean coal; installation of equipment and installations for purifying, processing, refining and overheating chemical dry-type gas; technical management, namely, maintenance of installations for vitrifying hazardous waste, toxic ash, asbestos, toxic ash, sanding dust, polluted soil, sludge from purification stations, mineral toxic waste and hospital waste; technical management, namely, maintenance of installations for reducing the volume of hazardous radioactive waste; technical management, namely, maintenance of installations for the recovery of metals; technical management, namely, maintenance of installations for the gasification of coal and lean coal; technical management, namely, maintenance of installations for purifying, processing, refining and overheating chemical dry-type gas; technical advice regarding the servicing, repair, maintenance, and cleaning of installations for reducing the volume of hazardous radioactive waste, of installations for the recovery of metals, of installations for the gasification of coal and lean coal, and of installations for purifying, processing, refining and overheating chemical dry- type gas; consulting regarding the installation and maintenance of installations for purifying, processing, refining and overheating chemical dry-type gas