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| 中央控制 | |||
| federal control: 25 phrases in 9 subjects |
| Automobiles | 1 |
| Desert science | 1 |
| Earth sciences | 5 |
| Ecology | 3 |
| Environment | 3 |
| General | 1 |
| Nautical | 1 |
| Technology | 6 |
| Water resources | 4 |
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