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| 给水工程; 供水工程 | |||
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| 供水工程［学］; 给水工程［学］ | |||
| 给水工程 | |||
| 供水工程; 给排水工程 (学); 给水工程学 | |||
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water-supply engineering : 6 phrases in 3 subjects |
| Ecology | 1 |
| Hydroelectric power stations | 3 |
| Technology | 2 |
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