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| International Standard Category: Other mining equipment |
NB/T 10522.4-2021 Automatic waterproof door for mining—Part 4:Technical regulation for operation and maintenance
矿用自动控制防水闸门 第4部分：操作及维护要求;
| Category No.: | 73.100.99 | Valid Status: | valid |
| Issued Organization: | China Energy Administration | Issued Date: | 2021-01-07 |
| Implemented Date: | 2021-4-1 | Abolished Date: | |
| Superseded Standard.: | Superseded Date: |
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