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| 海峡引航员 | |||
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channel pilot : 23 phrases in 9 subjects |
| Air defense | 1 |
| Computer networks | 1 |
| Electronics | 7 |
| Engineering geology | 1 |
| Hydroelectric power stations | 2 |
| Information technology | 2 |
| Shipbuilding | 1 |
| Technology | 7 |
| Telecommunications | 1 |
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