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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 37270.2-2018 |
Vector map of marine fundamental geographic feature—Part 2：Symbol database design 海洋基础地理要素矢量地图-第2部分:符号库设计 |
China National Standards 2：Symbol |
 English PDF |
| 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 |
China National Standards 2：Symbol |
English PDF |
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