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| 51. | continuous-wave tracking system |
| 连续波跟踪系统 |
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| 52. | ground communication tracking system |
| 地面通信跟踪系统 |
|
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| 53. | detection and tracking system |
| 侦察和跟踪系统 |
|
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| 54. | spacecraft tracking system |
| 航天器跟踪测量系统 |
|
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| 55. | infrared star tracker system |
| 红外星体跟踪系统 |
|
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| 56. | communication and tracking system |
| 通信与跟踪系统 |
|
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| 57. | optic ship tracking system |
| 光学船舶跟踪系统 |
|
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| 58. | laser automatic tracking system |
| 激光自动跟踪系统 |
|
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| 59. | phase lock Doppler tracking system |
| 锁相多普勒跟踪系统 |
|
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| 60. | satellite tracking laser system |
| 卫星跟踪激光系统 |
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