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| 信息中心 | |||
| 文献中心 | |||
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documentation center : 25 phrases in 13 subjects |
| Advertising | 1 |
| Aviation | 2 |
| Commerce | 1 |
| Earth sciences | 2 |
| Electronics | 5 |
| General | 2 |
| Information technology | 1 |
| Law | 1 |
| Librarianship | 2 |
| Name of organization | 1 |
| Space | 1 |
| Telecommunications | 5 |
| United States | 1 |