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| 热线; 直达通信线路; 带电线路 | |||
| 直通电话线路 | |||
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hotline : 13 phrases in 11 subjects |
| Aviation | 1 |
| Commerce | 2 |
| Economy | 1 |
| Electronics | 1 |
| Engineering geology | 1 |
| Finances | 1 |
| Information technology | 1 |
| Securities | 1 |
| Space | 1 |
| Statistics | 1 |
| Technology | 2 |
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