限定符号 meaning in Chinese

qualifying symbol

Graphical symbols for diagrams - part 2 : symbol elements , qualifying symbols and other symbols having general application
图示用图形符号.第2部分:符号要素限定符号和其它一般应用符号
Graphical symbols for electrical diagrams - part 2 symbol elements , qualifying symbols and other symbols having general application
电气简图用图形符号第2部分：符号要素限定符号和其他常用符号