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专用通信 : 61 phrases in 13 subjects |
| Agriculture | 1 |
| Automobiles | 1 |
| Aviation | 5 |
| Communications | 3 |
| Electronics | 27 |
| General | 1 |
| Information technology | 2 |
| Multimedia | 1 |
| Rail transport | 2 |
| Space | 8 |
| Technology | 6 |
| Telecommunications | 3 |
| United States | 1 |
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