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| orbit中地轨道; 中高度地球轨道 | |||
| medium earth: 14 phrases in 9 subjects |
| Air defense | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| Geology | 1 |
| Multimedia | 1 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Space | 5 |
| Telecommunications | 2 |
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