68 INDUSTRIE | MT 6831 bâtiment et travaux publics | NT1 aménagement hydraulique | NT1 construction de route | NT1 dragage | NT1 drainage | NT1 génie civil | NT1 grands travaux | RT industrie du bâtiment [6831] | politique de la construction [28
68 INDUSTRY | MT 6831 building and public works | NT1 civil engineering | NT1 drainage | NT1 dredging | NT1 hydraulic works | NT1 large-scale construction | NT1 road building | RT building industry [6831] | construction policy [2846] | town pl