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美国空军先进到什么程度? - 知乎

 4 years ago
source link: https://www.zhihu.com/question/38337451/answer/677040777
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空军装备中有这样一种作用重大但又比较默默无闻的机种——无人靶机。顾名思义,就是在空军训练、演习或试…

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