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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB 55009-2021 |
Code for design of city gas engineering 燃气工程项目规范 |
China National Standards design city gas |
 English PDF |
| GB 50028-2006 |
Code for design of city gas engineering(2020) 城镇燃气设计规范(2020年版) |
China National Standards design city gas |
English PDF |
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