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Advisory services relating to industrial engineering; Engineering services for others; Engineering consultancy services; Civil engineering; Engineering testing; Conducting engineering surveys; Preparation of engineering reports; Provision of engineering reports; Provision of information relating to industrial engineering; Engineering services for the analysis of structures; Engineering services in the field of building technology; Engineering services in the field of energy technology; Engineering services relating to energy supply systems; Engineering services in the field of electrical power and natural gas production; Technical engineering; Technical consultancy services relating to civil engineering; Technical consulting in the field of environmental engineering; Engineering consultancy relating to testing; Technological engineering analysis; Engineering services in the field of environmental technology; Quality audits; Certification services for the energy efficiency of buildings; Advisory services relating to energy efficiency; Consultancy in the field of energy-saving; Advisory services relating to the use of energy; Control technology consulting services; Consultancy relating to technological services in the field of power and energy supply; Energy auditing; Preparation of technological reports; Expert reporting services relating to technology; Professional consultancy relating to the conservation of energy; Professional consultancy relating to technology; Professional consultancy relating to energy efficiency in buildings; Providing technical advice relating to energy-saving measures; Technical consultancy in the field of light engineering; Technological analysis relating to energy and power needs of others; Technical advice in connection with energy-saving measures; Technological consultancy in the fields of energy production and use; Technological consulting services in the field of alternative energy generation; Technological consultancy; Technical design and planning of heating installations; Monitoring of events which influence the environment within buildings; Monitoring of activities which influence the environment within buildings