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| 奥米伽导航 | |||
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| 欧米加导航 | |||
| Omega navigation: 17 phrases in 7 subjects |
| Aviation | 2 |
| Electronics | 2 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Shipbuilding | 2 |
| Space | 6 |
| Technology | 3 |
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