6
Common metals and their alloys, ores; metal materials for building and construction; Metal building materials; Standing brackets, lifting brackets, wall (dowel) fastenings; Components of metal for fastening heating elements; Frames and mounts of metal for solar modules; Connecting elements of metal for joining individual parts, namely sliding pieces, ball joints, assembly elements and fixing plates; drain traps [valves] of metal; water-pipe valves of metal; steel pipes; metal fittings, couplings, connectors and clips for cables and pipes; pipes and tubes of metal; reinforcing materials of metal for pipes; rotating junctions of metal for pipes; metal pipes and tubes for liquid and gas transfer; metal tubing and tubing couplings for joining and terminating pipes; containers of metal for chemicals, compressed gases and liquids; water tanks of metal for industrial purposes; metal drainage pipes
7
Machines and machine tools for treatment of materials and for manufacturing; motors and engines, except for land vehicles; machine coupling and transmission components, except for land vehicles
37
Application of surface coatings; Construction, installation, maintenance and repair of gas and water supply and distribution apparatus; construction, installation, maintenance and repair of gas and water pipelines; construction, installation, maintenance and repair of water pollution control equipment and water purifying apparatus; construction, installation, maintenance and repair services relating to water irrigation and rainwater drainage systems; construction, installation, maintenance and repair of environmental control systems; construction, installation, maintenance and repair of air-conditioning control systems; construction, installation, maintenance and repair of food and beverage dispensing units; provision of information relating to the aforementioned services
40
Heat treatment of metal surfaces; Application of wear-resistant coatings on metals and plastics; Application of protective surface coatings to machines and tools; treatment of materials by laser beam; Sandblasting services; treatment and coating of metal surfaces; heat treatment of pipes and tubes made of metal; treatment of materials using ultrasonic waves to modify their properties; treatment of metal parts to prevent corrosion using hot-dip galvanizing and powder coating processes; surface finishing of metal articles; coating and surface finishing of machines and tools; custom manufacture of machines and tools with a protective surface coating; processing of metal surfaces by precision grinding and abrasive polishing; application of thin films on the surfaces of objects by means of chemical, mechanical, thermal, thermomechanical, chemical vapor deposition, physical vapor deposition and vacuum deposition processes