PRODUCTOS DE ACERO. PERFIL U NORMAL (UPN). MEDIDAS Y TOLERANCIAS
STEEL PRODUCTS. SECTION UPN (CHANNELS). DIMENSIONS AND TOLERANCES
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77.140.70 / Steel profiles
CTN 36 - Iron and steel
EU 24:1962 (Non-equivalent)
UNE-EN 10279:2001
It is cancelled by: UNE 36522:2001