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多功能 控制 : 25 phrases in 9 subjects |
| Air defense | 1 |
| Automobiles | 6 |
| Aviation | 7 |
| Electronics | 2 |
| Metallurgy | 1 |
| Rail transport | 1 |
| Space | 2 |
| Technology | 3 |
| Telecommunications | 2 |
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