DIBUJOS TECNICOS. FORMATOS Y PRESENTACION DE LOS ELEMENTOS GRAFICOS DE LAS HOJAS DE DIBUJO
TECHNICAL DRAWINGS. SIZES AND LAYOUT OF DRAWING SHEETS.
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01.100.01 / Technical drawings in general
CTN 1 - General standards
ISO 5457:1980 (Identical)
It is cancelled by: UNE-EN ISO 5457:2000