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| 水文条件 | |||
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| 水文条件; 水文状况 | |||
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| 水文条件; 水文状况 | |||
| hydrological conditions: 8 phrases in 4 subjects |
| Bridge construction | 1 |
| Ecology | 2 |
| Rail transport | 1 |
| Technology | 4 |
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