DIBUJOS TECNICOS. REPRESENTACION SIMPLIFICADA DE LOS AGUJEROS DE CENTRADO
TECHNICAL DRAWINGS. SIMPLIFIED REPRESENTATION ON CENTRE HOLES.
Buy on AENOR
01.100.20 / Mechanical engineering drawings
CTN 1 - General standards
ISO 6411:1982 (Non-equivalent)
It is cancelled by: UNE-EN ISO 6411:1998