China 'GB/T 4728.2-2018
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 4728.2-2018
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
Issued Date:2018
Implemented Date:2018
Issued by:
The Standardization Administration of the People's Republic of China
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