EN 81346-2:2009 Industrial systems, installations and equipment and industrial products - Structuring principles and reference designations - Part 2: Classification of objects and codes for classes
European Committee for Electrotechnical Standardization(CENELEC)
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2009EN 81346-2:2009 Industrial systems, installations and equipment and industrial products - Structuring principles and reference designations - Part 2: Classification of objects and codes for classes