Dibujos técnicos. Acotación y tolerancias de perfiles. (ISO 1660:1987).
Technical drawings - Dimensioning and tolerancing of profiles (ISO 1660:1987)
Dessins techniques - Cotation et tolérancement des profils (ISO 1660:1987)
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01.100.01 / Technical drawings in general
CTN 1 - General standards
EN ISO 1660:1995 (Identical)
ISO 1660:1987 (Identical)
It is cancelled by: UNE-EN ISO 1660:2017 (Ratificada)
Cancel: UNE 1121-3:1975