This standard specifies the graphical symbols used to represent logical functions. These graphical symbols may also be used to represent physical devices that perform these logical functions. Symbols are designed with electrical applications in mind, but most of them can also be used in non-electrical areas such as pneumatic, hydraulic and mechanical
GB/T 4728.12-1996 history
2022GB/T 4728.12-2022 Graphical symbols for electrical diagrams—Part 12:Binary logic elements
2008GB/T 4728.12-2008 Graphical symbols for diagrams.Part12:Binary logic elements
1996GB/T 4728.12-1996 Graphical symbols for electrical diagrams. Part 12: Binary logic elements