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服务 功能 : 23 phrases in 10 subjects |
| Aviation | 1 |
| China | 1 |
| Commerce | 1 |
| Computer networks | 3 |
| Desert science | 1 |
| Electronics | 9 |
| Information technology | 1 |
| Librarianship | 1 |
| Technology | 1 |
| Telecommunications | 4 |
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