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| 地面段 | |||
| 地面段 (航天工程大系统的地面部分，相对于 space segment) | |||
| 地面部分①卫星通信系统中的地面部分②线路中的地回线部分 | |||
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ground segment : 14 phrases in 3 subjects |
| Air defense | 2 |
| Aviation | 2 |
| Space | 10 |
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