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| 空间跟踪 | |||
| 航天跟踪; 空间跟踪〔系统〕 | |||
| space tracking: 76 phrases in 10 subjects |
| Air defense | 11 |
| Aviation | 8 |
| Computer networks | 1 |
| Earth sciences | 1 |
| Electronics | 6 |
| General | 3 |
| Oil / petroleum | 1 |
| Space | 38 |
| Technology | 5 |
| United States | 2 |
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