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| 循环水系统; 水流循环系统 | |||
| water circulation system: 18 phrases in 8 subjects |
| Architecture | 1 |
| Earth sciences | 1 |
| Ecology | 1 |
| Electronics | 2 |
| Hydroelectric power stations | 1 |
| Refrigeration | 1 |
| Technology | 10 |
| Water resources | 1 |
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