Metallic drain traps; valves of metal, other than parts of machines; water-pipe valves of metal; steel pipes; metal pipe fittings; metal pipe couplings and joint connectors; metal pipe clips; metal fittings for non-electric cables of metal; metal couplings for non-electric cables of metal; metal cable connectors; 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 metal 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; ducts of metal for ventilating and air-conditioning installations

Heating, cooling, steam generating and air conditioning installations and apparatus; heating and cooling apparatus for dispensing hot and cold beverages; thermostatic valves as parts of heating installations; steam heating apparatus for industrial purposes; sprinkler systems comprised of valves, filters and regulators for irrigation; irrigation apparatus for agricultural and horticultural use, namely irrigation sprinklers, irrigation spray nozzles; filters for use in swimming pools; heaters for use in swimming pools; waste water treatment and purification installations and apparatus, namely waste water treatment tanks, microbubble generators for waste water treatment, clarification and thickening machines for use in treatment of liquids in the nature of water, waste water and industrial water; air valves for steam heating installations; steam superheaters for industrial purposes; ionization apparatus for the treatment of liquids and gases for industrial, commercial or agricultural use; temperature-controlled food and beverage dispensing units, other than vending machines; water distribution installations in the nature of water coolers; gas purification apparatus, namely, gas purification machines; dosing valves as parts of heating or gas installations; regulating accessories for water or gas apparatus and pipes; safety accessories for water or gas apparatus and pipes, namely, flashback arrestors and reverse flow check valves

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

Heat treatment of metal surfaces; treatment of materials by laser beam; treatment and coating of metal surfaces, namely, applying decorative and protective coatings to metal; 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; surface 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; provision of information relating to the aforementioned services

Engineering services relating to gas and water supply and distribution systems; engineering services relating to gas and water pipelines; engineering services relating to of water pollution control and water purifying systems; engineering services relating to water irrigation and rainwater drainage systems; engineering services relating to environmental control systems; engineering services relating to air-conditioning control systems; technical design and planning of pipelines for gas, water and waste water; design and development of valves, regulators and controls for gas and water supply and distribution systems; design and development of food- and beverage dispensing units; provision of information relating to the aforementioned services