Barbecue grill cleaning services; Cleaning services, namely, mechanically removing scale and sludge from tubes in steam generators in nuclear power plants; Installation of refrigerating apparatus; Installation of ventilating apparatus; Installation of lighting apparatus; Installation, maintenance and repair of refrigerating apparatus; Installation, maintenance and repair of ventilating apparatus; Installation, maintenance and repair of ventilating systems; Installation, repair and maintenance of condensing apparatus, steam condensers, radiators for motors and engines, air reheaters, boiler tubes; Maintenance and repair of refrigerating apparatus; Maintenance and repair of ventilating apparatus; Maintenance of electronic apparatus; Maintenance of lighting apparatus; Maintenance, repair, replacement and tuning of components, parts or systems in steam and gas turbine generators; Repair and maintenance of refrigerating apparatus; Repair and maintenance of ventilating apparatus; Repair of cooking apparatus; Repair of electronic apparatus; Repair of heating apparatus; Repair of lighting apparatus