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| 运行水位; 工作电平 | |||
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operating level : 23 phrases in 9 subjects |
| Aviation | 1 |
| Earth sciences | 1 |
| Electronics | 2 |
| Engineering geology | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Project management | 1 |
| Technology | 13 |
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