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可读 写 : 37 phrases in 14 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Business | 1 |
| Data processing | 1 |
| Earth sciences | 1 |
| Electronics | 11 |
| General | 1 |
| Information technology | 6 |
| Librarianship | 1 |
| Mathematics | 1 |
| Metallurgy | 2 |
| Space | 4 |
| Technology | 1 |
| Telecommunications | 5 |
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