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41. | multitarget tracking |
| 多目标跟踪 |
|
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42. | following-up type |
| 跟踪型式 |
|
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43. | digital tracking |
| 数字跟踪 |
|
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44. | photographic tracking |
| 照相跟踪 |
|
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45. | circuit tracing |
| 电路跟踪 |
|
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46. | pursuit movement |
| 跟踪运动 |
|
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| |
47. | comprehensive trace |
| 全跟踪 |
|
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48. | photoelectric tracking |
| 光电跟踪 |
|
|
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49. | trace facilities |
| 跟踪设施 |
|
|
| |
50. | monopulse tracking |
| 单脉冲跟踪 |
|
|
| |