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子模 块 : 121 phrases in 10 subjects |
| Air defense | 5 |
| Automobiles | 47 |
| Aviation | 21 |
| Earth sciences | 1 |
| Electronics | 36 |
| Geophysics | 2 |
| Mechanics | 1 |
| Metallurgy | 1 |
| Navigation | 1 |
| Technology | 6 |
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