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| electronic positioning system | |||
| electronic position fixing system | |||
| 电子定位系统: 14 phrases in 7 subjects |
| Air defense | 2 |
| Aviation | 2 |
| Earth sciences | 1 |
| Electronics | 2 |
| Geophysics | 1 |
| Space | 3 |
| Technology | 3 |
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