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| 空间电波; 天空电波 | |||
| 空间波 | |||
| 天波 | |||
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space wave : 19 phrases in 7 subjects |
| Air defense | 4 |
| Communications | 1 |
| Electronics | 4 |
| Project management | 1 |
| Shipbuilding | 1 |
| Space | 4 |
| Technology | 4 |
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