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21. | circuit tracing |
| 电路跟踪 |
|
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22. | a tail; a follower |
| 跟踪者 |
|
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23. | elevation tracking |
| 仰角跟踪 |
|
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24. | trace facilities |
| 跟踪设施 |
|
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25. | infrared tracking |
| 红外跟踪 |
|
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26. | digital tracking |
| 数字跟踪 |
|
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27. | closed-loop tracking |
| 闭环跟踪 |
|
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28. | comprehensive trace |
| 全跟踪 |
|
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29. | following-up type |
| 跟踪型式 |
|
|
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30. | pursuit movement |
| 跟踪运动 |
|
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