Education and training services; arranging and conducting seminars, conferences, congresses and workshops.

Engineering services; provision of engineering consultancy services; providing technical consulting services to businesses specifically for improving the efficiency of process operations and for the purposes of process simulation or other related applications as applied to all or portions of a manufacturing process or processing plant relating to the oil and gas industry.

Distribution of energy; Distribution of water and any type of fluid, gas and/or electricity; Water supplying, transport by pipeline; Transport of waste; Collection of waste.

Recycling of waste and rubbish; Treatment and processing of waste by mechanical and chemical means and its classification; Mechanical and chemical treatment and processing of all kinds of fluids; Water treatment; Production and recovery of energy, electricity, gas, heating, steam and water.

Engineering services; Technical research; Technical project studies; Research and development of new products; In general, services provided by physicists, engineers or computer specialists.

Construction, installation, repair, maintenance of installations for the production of energy; Construction, installation, repair, maintenance and drainage of pipes for water and any other type of fluid, including gas and/or electricity; Disinfection and rat exterminating; cleaning of public roads, demolition of buildings, rental of cleaning machines, cleaning of road surfaces, snow ploughs, salt spreaders.

Distribution of energy; Distribution of water and any type of fluid, gas and/or electricity; Water supplying, transport by pipeline; Transport of waste; Collection of waste; rental of containers for waste, transport of waste and refuse, storage of waste and refuse.

Recycling of waste and rubbish; Treatment and processing of waste by mechanical and chemical means and its classification; Mechanical and chemical treatment and processing of all kinds of fluids; Water treatment; Production and recovery of energy, electricity, gas, heating, steam and water; separation of waste, refuse and recyclable materials, recycling of waste and refuse, treatment of waste (transformation), incineration of waste and refuse, destruction of waste and refuse, composting of waste, Consultancy in the utilisation and elimination of waste and refuse.

Engineering services; Technical research; Technical project studies; Research and development of new products; In general, services provided by physicists, engineers or computer specialists;.

Horticulture services, Lawn care, Parks maintenance.

Water level indicators; Scientific, measuring, signalling and checking (supervision) apparatus and instruments.

Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes.

Building materials (non-metallic); Non-metallic rigid pipes for building; Asphalt, pitch and bitumen; Non-metallic transportable buildings; Monuments, not of metal; Floorboards.

Containers, not of metal [storage, transport]; Sideboards (furniture); Water pipe valves of plastic; Signboards of wood or plastics.

Advertising; Business management; Business administration; Office functions.

Insurance; Financial affaires; Monetary affairs; Real estate affairs.

Construction; Repair of machines; Repair of turbines; Pump repair; Repairing construction works; Scaffolding repair; Heating equipment installation and repair; Maintenance and repair of heating; Air conditioning apparatus installation and repair; Repair or maintenance of air-conditioning apparatus [for industrial purposes]; Ceiling repair; Redressing facades; Building repair; Renovation and repair of buildings; Window repair; Maintenance and repair of pipelines; Pipeline installation and repair; Services for the repair of pipes; Services for the repair of drains; Maintenance and repair of pipes used in industrial equipment; Maintenance and repair of pipeline systems; Maintenance and repair of lifts; Pipe laying; Installation of plant; Lift installation; Installation of industrial plant; Installation of electrical and generating machinery; Installation and maintenance of photovoltaic installations; Oil pipeline laying; Installation of street furniture; Installing septic tanks; Installing wood flooring; Pipeline construction and maintenance; Installation of sewer liners; Installation of smelting furnaces; Installation of oil refineries; Pipe installation services; Installation of environmental engineering systems; Plumbing and gas and water installation; Services for the installation of drains; Installation and maintenance of irrigation systems; Installation, repair and maintenance of boiler tubes; Installation of pipe systems for conducting of liquids; Installation of pipe systems for conducting of steam; Installation of pipe systems for conducting of gases.

Telecommunications.

Transport; Package and storage of goods; Travel arrangement.

Water treatment; Air purification; Water purification; Air purification; Desalination of water; Building dehumidification; Water pollution control; Demineralisation of water; Regeneration of water; Application of wear resistant coatings to engineering components; Glass tinting; Surface plating; Timber preservation; Conversion of nuclear fuels; Purification of gases; Purification of minerals by magnetic methods; Purification of minerals by chemical methods; Decontamination of hazardous materials; Land decontamination; Chemical decontamination of nuclear plant; Blacksmithing; Filtration of gases; Filtration of liquids; Removal of specified chemicals from chemical process fluids; Extruding of metal alloys; Extruding of plastics; Material treatment information; Material treatment information; Die casting; Metal casting; Metallurgical smelting; Metal coating; Galvanising of metal; Material treatment information; Metal treating; Processing of rubber; Processing of chemicals; Processing of plastics; Processing of iron oxides; Processing of fuel materials; Processing of organic chemical liquids; Processing of hydrocarbons; Gas production services; Processing of hydrocarbon derivatives; Recovery of hydrocarbons from gas; Sandblasting services; Petrochemical refining services; Gas production services; Treatment of hazardous liquids.

Scientific and industrial research, computer programming; Services provided by engineers dealing with appraisals, valuations, research and surveys.

Construction, repair and maintenance of real estate and public infrastructures.

Preparation and development of architectural and engineering projects for buildings and public infrastructures.