This part of ISO 1219 establishes principles for the use of sym-bols and specifies basic symbols and rules for devising func-tional symbols. It also includes examples of functional symbols.
BS 2917-1:1993 history
2012BS ISO 1219-1:2012 Fluid power systems and components. Graphical symbols and circuit diagrams. Graphical symbols for conventional use and data-processing applications
1993BS 2917-1:1993 Graphic symbols and circuit diagrams for fluid power systems and components - Specification for graphic symbols