Letter symbols to be used in electrical technology - Part 7: Power generation, transmission and distribution (IEC 60027-7:2010); German version EN 60027-7:2010— 39 стр.
Letter symbols to be used in electrical technology - Part 7: Power generation, transmission and distribution (IEC 60027-7:2010); German version EN 60027-7:2010— 39 стр.
Direct acting indicating analogue electrical measuring instruments and their accessories; part 1: definitions and general requirements common to all parts (IEC 60051-1:1984, edition 4); german version EN 60051-1:1989— 26 стр.
Design of graphical symbols for use in the technical documentation of products - Part 1: Basic rules (ISO 81714-1:1999); German version EN ISO 81714-1:1999— 14 стр.