NF C63-079:1981 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR FOR INDUSTRIAL USE. INDUCTIVE PROXIMITY SWITCHES. DEFINITIONS,CLASSIFICATION AND DESIGNATION. (EUROPEAN STANDARD EN 50 032).
1981NF C63-079:1981 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR FOR INDUSTRIAL USE. INDUCTIVE PROXIMITY SWITCHES. DEFINITIONS,CLASSIFICATION AND DESIGNATION. (EUROPEAN STANDARD EN 50 032).