Technical drawings - General principles of presentation - Part 20: Basic conventions for lines (ISO 128-20:1996); German version EN ISO 128-20:2001— 14 стр.
Technical drawings - General principles of presentation - Part 21: Preparation of lines by CAD-systems (ISO 128-21:1997); German version EN ISO 128-21:2001— 16 стр.
Design of graphical symbols for use in the technical documentation of products - Part 2: Specification for graphical symbols in a computer sensible form, including graphical symbols for a reference library, and requirements for their interchange (IEC 81714-2:1998); German version EN 81714-2:1998— 54 стр.
Technical drawings - General principles of presentation - Part 21: Preparation of lines by CAD-systems (ISO 128-21:1997); German version EN ISO 128-21:2001— 16 стр.