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51. | photographic tracking |
| 照相跟踪 |
|
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52. | circuit tracing |
| 电路跟踪 |
|
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| |
53. | comprehensive trace |
| 全跟踪 |
|
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54. | on-line tracking |
| 联机跟踪 |
|
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55. | trace facilities |
| 跟踪设施 |
|
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56. | photoelectric tracking |
| 光电跟踪 |
|
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57. | pursuit movement |
| 跟踪运动 |
|
|
| |
58. | monopulse tracking |
| 单脉冲跟踪 |
|
|
| |
59. | multitarget tracking |
| 多目标跟踪 |
|
|
| |
60. | hurricane tracking |
| 飓风跟踪 |
|
|
| |