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ground communication
| tracking system
| ground communication | |
| tech. | 地面通信; 地面交通 |
| tracking system | |
| auto. | 追 踪系统 |
| avia. | 外测体制 |
| commun. railw. | 追踪系统 |
| math. | 跟踪系统 |
| space | 跟踪 体制 |
| |||
| 地面通信; 地面交通 | |||
|
ground communication tracking system : 53 phrases in 9 subjects |
| Air defense | 6 |
| Aviation | 16 |
| Communications | 1 |
| Electronics | 1 |
| General | 1 |
| Rail transport | 1 |
| Space | 13 |
| Technology | 10 |
| Telecommunications | 4 |
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