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21. | ATTS (Automatic Target Tracking System) |
| 目标自动跟踪系统 |
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22. | automatic digital tracking analyzer computer |
| 自动跟踪分析数字计算机 |
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23. | automatic terrain following system |
| 自动地形跟踪系统 |
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24. | precision automated tracking system (PATS) |
| 精密自动跟踪系统 |
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25. | automatic gas trace analyzer |
| 自动气体跟踪分析仪 |
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26. | automatic curve follower |
| 自动曲线跟踪装置 |
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27. | selective optical lock-on |
| 选择性光学自动跟踪 |
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28. | tracking acquisition |
| 截获并自动跟踪 |
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29. | satellite automatic tracking antenna |
| 人造卫星自动跟踪天线 |
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30. | automatic station keeping syste |
| 电台自动跟踪系统 |
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