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| 循环水系统 | |||
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circulating water system : 19 phrases in 8 subjects |
| Agriculture | 1 |
| Ecology | 1 |
| Electric machinery | 1 |
| Nautical | 2 |
| Nuclear and fusion power | 5 |
| Refrigeration | 1 |
| Technology | 6 |
| Water resources | 2 |
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