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情报源 : 37 phrases in 13 subjects |
| Agriculture | 1 |
| Air defense | 8 |
| Aviation | 3 |
| Electronics | 1 |
| General | 3 |
| International trade | 1 |
| Librarianship | 1 |
| Space | 5 |
| Statistics | 1 |
| Technology | 9 |
| Telecommunications | 1 |
| Textile industry | 2 |
| United States | 1 |
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