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| space transportation Transportation by means of vehicles designed to operate in free space outside the earth's atmosphere (专为自由空间之外的地球大气层设计的以交通工具为方式的交通运输。) | |||
| 空间运输: 38 phrases in 7 subjects |
| Air defense | 1 |
| Aviation | 10 |
| China | 1 |
| Electronics | 2 |
| Remote sensing | 1 |
| Space | 14 |
| United States | 9 |