現在美國的大推力火箭發動機用俄國貨，登月40多年了，按理火箭發動機應該更成熟更先進了嘛

來源: 頭發與財富成反比於 2015-05-29 23:25:50 [舊帖] [給我悄悄話] 本文已被閱讀：次

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