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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| NB/T 11169—2023 |
Technical Specifications for Directional Drilling of Long Boreholes for Underground Coal Mine Gas Drainage {译} 煤矿井下瓦斯抽采长钻孔定向钻进技术规范 |
China Energy Industry
Standards Technical specifications borehole |
 English PDF |
| NB/T 11028—2022 |
Technical specifications for borehole closure of waste gas drainage in underground coal mines {译} 煤矿井下废弃瓦斯抽采钻孔封闭技术规范 |
China Energy Industry
Standards Technical specifications borehole |
English PDF |
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