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水 限制 : 39 phrases in 14 subjects |
| Agriculture | 1 |
| Automobiles | 1 |
| Ecology | 3 |
| Economy | 1 |
| Engineering geology | 1 |
| Exhibitions | 1 |
| Genetics | 1 |
| Hydroelectric power stations | 2 |
| Metallurgy | 1 |
| Nautical | 3 |
| Scuba diving | 3 |
| Sports | 1 |
| Technology | 15 |
| Water resources | 5 |
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