64 PRODUCTION, TECHNOLOGIE ET RECHERCHE | MT 6411 technologie et réglementation technique | BT1 produit non plat | BT2 technologie des matériaux | RT tuyauterie [6821]
64 PRODUCTION, TECHNOLOGY AND RESEARCH | MT 6411 technology and technical regulations | BT1 non-flat product | BT2 materials technology | RT piping [6821]