时间:2019-01-21 10:26来源:高端装备发展研究中心 作者:中国航空
[5]Jeff Foust:Air Force adds more than $40 million to SpaceX engine contract,2017.
[6]Andrew Liptak:Here’s what Elon Musk revealed about the ITS and SpaceX’s Mars ambitions in his Reddit AMA 2017.
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