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| switched data network | |||
| 交 换数据网络: 21 phrases in 8 subjects |
| Artificial intelligence | 1 |
| Aviation | 1 |
| Business | 1 |
| Computer networks | 2 |
| Electronics | 10 |
| Information technology | 4 |
| Rail transport | 1 |
| Technology | 1 |
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