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王小军在视频中为全球航天人士带来《载人火星探测航天运输系统》演讲视频截图（下同）地球上升段：7枚重型运载火箭和1枚载人运载火箭，采用化学推进剂。地球空间摆渡地火转移阶段：基于高比冲核电推进技术的摆渡级，以及基于高比冲大推力核热推进技术的地火

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