NF C03-161:1996 INDUSTRIAL SYSTEMS, INSTALLATIONS AND EQUIPMENT AND INDUSTRIAL PRODUCTS. STRUCTURING PRINCIPLES AND REFERENCE DESIGNATIONS. PART 1 : BASIC RULES. (EUROPEAN STANDARD EN 61 346-1).
1996NF C03-161:1996 INDUSTRIAL SYSTEMS, INSTALLATIONS AND EQUIPMENT AND INDUSTRIAL PRODUCTS. STRUCTURING PRINCIPLES AND REFERENCE DESIGNATIONS. PART 1 : BASIC RULES. (EUROPEAN STANDARD EN 61 346-1).