It is of great military significance to identify propeller-driven aircraft using the active service radar.

用现役雷达识别螺旋桨飞机具有重要的军事意义。

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It is of great military significance to identify propeller-driven aircraft using the active service radar.

用现役雷达识别螺旋桨飞机具有重要的军事意义。

youdao