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| 同步数据链路 | |||
| synchronous data link: 15 phrases in 9 subjects |
| Agriculture | 1 |
| Aviation | 1 |
| Electronics | 2 |
| Information technology | 2 |
| Multimedia | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Technology | 3 |
| Telecommunications | 2 |
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