Home / Standards / GBT 4728.2-2018 GBT 4728.2-2018 Graphical symbols for electrical diagrams—Part 2: Symbol elements, qualifying symbols, and other commonly used symbols 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 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A