7
Conveyor machines, conveyor belts, machines and mechanical installations for industry, chemistry and energy supply
37
Building construction; Electrical fitting work; Assembling, installation, maintenance and repair of high-voltage, medium-voltage and low-voltage installations, stations and switchgear, building installations, pipelines and conveying technology, computer systems and networks (hardware), telecommunications installations (hardware), fire-alarm systems, video installations and access control and burglar alarm installations
38
Telecommunications
40
Metal treating, treatment of plastics
42
Technical planning and technical design of high-voltage, medium-voltage and low-voltage installations, stations and switchgear, building installations, computer systems and networks, telecommunications installations, fire-alarm systems, video installations and access control and burglar alarm installations; Technical consultancy in the field of security in relation to high-voltage, medium-voltage and low-voltage installations, stations and switchgear, building installations, pipelines and conveying technology, computer systems and networks, telecommunications installations, fire-alarm systems, video installations and access control and burglar alarm installations
45
Consultancy in the field of security in relation to high-voltage, medium-voltage and low-voltage installations, stations and switchgear, building installations, computer systems and networks, telecommunications installations, fire-alarm systems, video installations and access control and burglar alarm installations