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单轨道 : 36 phrases in 10 subjects |
| Agriculture | 3 |
| Communications | 1 |
| Earth sciences | 1 |
| Electronics | 3 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Missiles | 1 |
| Rail transport | 5 |
| Space | 3 |
| Technology | 17 |
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