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检索法 : 39 phrases in 13 subjects |
| Agriculture | 2 |
| Automobiles | 1 |
| Business | 1 |
| Earth sciences | 1 |
| Electronics | 7 |
| Information technology | 7 |
| Librarianship | 3 |
| Management | 1 |
| Mathematics | 1 |
| Project management | 4 |
| Space | 1 |
| Technology | 7 |
| Telecommunications | 3 |
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