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双导线 : 48 phrases in 13 subjects |
| Air defense | 1 |
| Aviation | 2 |
| Earth sciences | 1 |
| Electric machinery | 3 |
| Electronics | 9 |
| General | 2 |
| Metallurgy | 1 |
| Nautical | 1 |
| Oil / petroleum | 3 |
| Rail transport | 1 |
| Shipbuilding | 1 |
| Space | 7 |
| Technology | 16 |
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