Measurement and control; graphical symbols and identifying letters for process measurement and control funktions, symbols for basic functions by use of process computers— 3 стр.
Preparation of documents used in electrotechnology - Part 1: General requirements (IEC 61082-1:1991 + Corr. 11.93); German version EN 61082-1:1993— 75 стр.
Preparation of documents used in electrotechnology - Part 1: General requirements (IEC 61082-1:1991 + Corr. 11.93); German version EN 61082-1:1993— 75 стр.