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| Doppler navigation system | |||
| Doppler navigational system | |||
| 多 普 勒导航系统: 32 phrases in 7 subjects |
| Aviation | 6 |
| Earth sciences | 1 |
| Electronics | 3 |
| Oil / petroleum | 3 |
| Shipbuilding | 2 |
| Space | 12 |
| Technology | 5 |
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