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| 专 用 自动交换机: 19 phrases in 8 subjects |
| Electronics | 5 |
| Hydroelectric power stations | 1 |
| Information technology | 4 |
| Multimedia | 2 |
| Nuclear and fusion power | 1 |
| Rail transport | 1 |
| Technology | 4 |
| United Nations | 1 |
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