003：火箭发射的背后（下）
Jan 17, 2015•25 min•Ep. 220
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Episode description
什么是第一宇宙速度？航天工程师的生活是怎样的？火箭是怎么被设计出来的？火箭的名字背后有什么学问？火箭发射发射场的生活是怎样的？本期“极客秀”，对话火箭工程师——虞新江。
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