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| 跟踪回路; 随动回路 | |||
| 跟踪环路［回路］ | |||
| tracking loop: 29 phrases in 6 subjects |
| Air defense | 3 |
| Aviation | 1 |
| Electronics | 3 |
| Shipbuilding | 1 |
| Space | 19 |
| Technology | 2 |
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