Graphical symbols; general principles for the creation of graphical symbols; graphical symbols for use in technical product documentation; identical with ISO 3461-2, edition 1987— 6 стр.
Refrigerating systems and heat pumps - System flow diagrams and piping and instrument diagrams - Layout and symbols; German version EN 1861:1998— 35 стр.
Ships and marine technology - Graphical symbols for technical documentation - Part 2: Piping and hose assemblies, pipe and hose-joints, penetrations— 7 стр.
Technical drawings - Simplified representation of pipelines - Terminal features of ventilation and drainage systems; identical with ISO 6412-3:1993— 5 стр.