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| 测线方位角 | |||
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bearing of line : 16 phrases in 9 subjects |
| Aviation | 1 |
| Electronics | 1 |
| Engineering geology | 2 |
| General | 1 |
| Navigation | 1 |
| Rail transport | 1 |
| Shipbuilding | 2 |
| Space | 2 |
| Technology | 5 |
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