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模块 化 系统 : 56 phrases in 10 subjects |
| Agriculture | 1 |
| Air defense | 3 |
| Aviation | 7 |
| Cryptography | 1 |
| Earth sciences | 1 |
| Electronics | 30 |
| Geology | 2 |
| Multimedia | 1 |
| Navigation | 2 |
| Space | 8 |
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