37 Chemical cleaning of boilers, pipes, and pipelines; Chemical cleaning of nuclear power plants and machines used in those plants; rental of construction machines that incorporate blade extensions for cutting building materials; Cleaning services, namely, cleaning equipment belonging to steel-making facilities in the nature of metal containers, pots, wooden hoppers, templates, furnaces, and casting paths; Cleaning and maintenance of machines in manufacturing facilities that process steel; Cleaning of dust, solids and sludge from steel-making plants, steel-making equipment, steel-making vessels, industrial plants, industrial equipment, industiral boilers, nuclear plants, nuclear plant equipment, buildings, and surfaces of industrial buildings; Cleaning of structures, namely, roads, bridges, pedestrian streets, walkways, and airport runways using wet and dry processes; Installing appliances; Construction and maintenance of buildings, namely, painting, sealing and elimination of parasites; Construction management; Rental of construction machinery; Pipe laying services; building renovation and regular building inspection in the course of building construction of steel-making plants and industrial plants;, repair, maintenance, and cleaning of steel-making plants, steel-making equipment, steel-making vessels, industrial plants, industrial equipment, industiral boilers, nuclear plants and nuclear plant equipment; Repair services in the nature of reconditioning of steel-making equipment; Installation, maintenance, and repair of chemical processing buildings, chemical processing plants, and chemical processing equipment; construction of buildings in the nature of chemical processing plants and plants for processing, handling, stirring, agitating, heating, cooling and treating molten metal; Installation, maintenance and repair of buildings, plants and equipment for processing, handling, stirring, agitating, heating, cooling and treating molten metal; construction of buildings in the nature of industrial electromagnetic induction buildings; installation, maintenance, and repair of industrial electromagnetic induction buildings and machinery used for making steel; Construction of buildings in the nature of industrial magneto-hydrodynamic induction buildings; installation, maintenance, and repair of industrial magneto-hydrodynamic induction buildings, magneto-hydrodynamic induction plants, magneto-hydrodynamic equipment; installation, demolition, repair and maintenance of machines for filtering, separating and centrifuging; dismantling, demolition and deconstruction of industrial electromagnetic induction buildings and plants; decommissioning services, namely, dismantling and deconstruction of industrial magneto-hydrodynamic buildings and plants; Installation of steel-making equipment; Painting of buildings; sealing of buildings; Installation of building insulation; Pest control services for commercial buildings; Maintenance of welding machines and welding equipment; Laying of pipelines; Chemical cleaning of boilers and associated pipelines; Chemical cleaning and disinfection of nuclear installations and parts of such installations; Consulting services in the field of construction; Repair and maintenance of roads by replacing surfacing materials; road construction in the nature of application of road surfacing materials and road marking materials; Road paving in the nature of surfacing, resurfacing and maintenance of roads, highways, airport runways, footpaths, parking lots, playgrounds, pavements, and sports surfaces; Information, consultancy and advisory services in the field of repair, maintenance, installation of road surfacing materials, application of road marking materials, and surfacing and resurfacing of roads, airport runways, paths, parking, playgrounds, pavements, and sports surfaces; Construction and repair of roads, highways, airport runways, footpaths, playgrounds, pavements, parking, and sports surfaces; concrete polishing, leveling, and sealing; Rental of construction equipment; Rental of equipment, namely, cutting machines, welding machines, welding equipment, crushing machinery, crushing equipment, shaping equipment, and shaping machinery; rental of equipment, apparatus and machines for processing, handling, pressing, cooling or treating molten metal, metal containing dross, namely, dross presses, heads for dross presses, crushing machines, milling machines, filtering machines, separators, centrifuges, steam condensers, shaping machines, and moulding machines; rental of construction equipment in the nature of dross presses, heads for dross presses, crushing machines, milling machines, filtering machines, separators, centrifuges, steam condensers, shaping machines, and moulding machines that cool and treat molten metal for building and construction purposes; Rental of construction equipment for recovering metal slag from grinding and milling operations; Leasing of metalworking machines for recovering metal slag from grinding and milling operations; Rental of machines for building purposes in the nature of scrap metal recovery machines, machine tools and apparatus for detecting and recovering metal from steel slag all for use in construction; Construction of buildings that handle, process, and prepare metal containing by-products; Refurbishing of electronics, namely, repair of electronic machines and repair of electronic apparatus; Aggregate production, namely, extraction of aggregate materials in the nature of mining extraction of clay, stone, and minerals; Mining extraction of clay, stone, and minerals; Mining extraction services; Soil and solid debris landfill services; Construction of real property; On-site deinstallation services, namely, deinstallation of computer hardware; consulting services related to hazardous waste clean-up services for contaminated soils; assembly services relating to the installation of industrial equipment; hazardous waste clean up services; minerals extraction of minerals by chemical and magnetic methods; Building sealing as a method of water proofing; building construction of facilities for handling, processing and preparation of metal containing by- products