37 Construction and repair; installation; plumbing; installation, maintenance and repair of electrical equipment; installation of gas and water distribution, telecommunication devices, illumination installations, installations for heating; construction and maintenance of cable networks; repair and maintenance of distribution stations for supplying energy and installation of heating and water distribution; installation, repair and maintenance of alternative energy generating equipment and machinery; laying of cables and pipelines; all the aforesaid services being part of the execution of technical projects in the field of energy supply, recycling and converting of waste, gas and fertilizers.
38 Telecommunications, including mobile telecommunication; services of a cable network operator.
39 Transportation and storage; services of an electricity company, including transport and distribution of electricity, gas, heat and water; electricity supply; transport of gas, liquids and solid substances through pipelines; transport and discharging of waste.
40 Generating, supplying and discharging of energy and electricity; waste disposal, including recycling and converting of waste and gas; treatment of waste; recycling of cooling apparatus; converting of waste; burning and disposal of waste; water treatment; all the aforesaid services being part of the execution of technical projects in the field of energy supply, recycling and converting of waste, gas and fertilizers.
42 Technical advice on energy supply, use of energy, heat- and water supply; research and study on energy-saving generating techniques; recycling and converting of waste, gas and fertilizers; technical advise on the construction and protection of networks; separating of waste and recyclable material; advising on waste disposal; advising in the field of environmental protection; rental of gas-, water supply- and heating equipment and apparatus; automation services; quality control; testing of amongst others electrical installations, gas-, water supply- and heating equipment and apparatus; information on the use of (electric) power and power failure to users, also in the field of preventing power failures, as well as information on analyzing of power consumption, power supply and how to make forecasts on power supply; advising on efficient use of energy-, electricity-, heat- and water supply; expertise on damage.