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| observed | |||
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| observed | |||
| 观察到的: 19 phrases in 12 subjects |
| Animal husbandry | 1 |
| Armored vehicles | 1 |
| Aviation | 2 |
| Commerce | 4 |
| Electronics | 1 |
| General | 3 |
| Hydroelectric power stations | 1 |
| Medical | 1 |
| Metallurgy | 1 |
| Pest control | 1 |
| Space | 1 |
| Technology | 2 |
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