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随机 发生 : 36 phrases in 9 subjects |
| Air defense | 2 |
| Cryptography | 7 |
| Electronics | 11 |
| General | 1 |
| Information technology | 2 |
| Oil / petroleum | 1 |
| Space | 6 |
| Technology | 5 |
| Telecommunications | 1 |
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