彩虹-4无人机在西北某地进行飞行训练
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数架彩虹-4无人机并列排放，等待飞行前的综合检查。[陈博渊 / 摄] Three CH-4 drones park side-by-side for all-round examination before a scheduled test flight in mid-June at an undisclosed airport in northwest China. [Photo by Chen Boyuan / China.org.cn] |
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数架彩虹-4无人机并列排放，等待飞行前的综合检查。[陈博渊 / 摄] Three CH-4 drones park side-by-side for all-round examination before a scheduled test flight in mid-June at an undisclosed airport in northwest China. [Photo by Chen Boyuan / China.org.cn] |
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