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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 16901.3-2009 |
Rules for the presentation of graphical symbols - Graphical symbols for use in the technical documentation of products - Part 3: Classification of connect notes, networks and their encoding 技术文件用图形符号表示规则 第3部分：连接点、网络的分类及其编码 |
China National Standards Classification coding the |
 English PDF |
| GB/T 21379-2008 |
Classification and coding of the attribute of traffic management information - City road 交通管理信息属性分类与编码 城市道路 |
China National Standards Classification coding the |
English PDF |
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