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| terrain following; terrain-following | |||
| terrain-following (飞行) | |||
| 地形跟踪: 42 phrases in 7 subjects |
| Air defense | 4 |
| Aviation | 8 |
| Earth sciences | 2 |
| Electronics | 9 |
| General | 1 |
| Space | 17 |
| United Kingdom | 1 |
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