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    NACE-BEL 2025 Codes71 Architectural and engineering activities; technical testing and analysis71.1 Architectural and engineering activities and related technical consultancy71.12 Engineering activities and related technical consultancy71.121 Engineering activities and technical consultancy, except activities of land surveyors71.12103
    71.12103Level 7

    Development of projects involving acoustic engineering, air conditioning, refrigeration, sanitation and pollution control, etc.

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    Parent code

    71.121Engineering activities and technical consultancy, except activities of land surveyors

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