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服务 单 元 : 87 phrases in 13 subjects |
| Air defense | 1 |
| Artificial intelligence | 1 |
| Aviation | 3 |
| Computer networks | 5 |
| Electronics | 35 |
| Exhibitions | 2 |
| General | 1 |
| Information technology | 13 |
| Multimedia | 3 |
| Rail transport | 1 |
| Space | 5 |
| Technology | 7 |
| Telecommunications | 10 |
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