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| code combination; encode combination | |||
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码组 合 : 34 phrases in 13 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Computers | 1 |
| Cryptography | 1 |
| Electronics | 3 |
| General | 2 |
| Information technology | 4 |
| Mathematics | 1 |
| Project management | 2 |
| Space | 2 |
| Technology | 5 |
| Telecommunications | 10 |
| Telegraphy | 1 |
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