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传送波 : 22 phrases in 10 subjects |
| Aviation | 1 |
| Drilling | 1 |
| Electronics | 6 |
| Geophysics | 1 |
| Navigation | 1 |
| Oil / petroleum | 1 |
| Radio | 1 |
| Shipbuilding | 1 |
| Technology | 7 |
| Telecommunications | 2 |
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