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20 天
“基建狂魔”要用榫卯工艺在月球盖房?专访“中国超级泥瓦匠”
丁烈云:月壤砖强度,有两个因素的影响非常大,一个因素是矿物的成分。不同的矿物成分会影响它的强度,另外还有一种是它的烧结方式不一样,烧结的工艺不一样,比方说我们这采取三种烧结工艺。 送往空间站的月壤砖形态不同,分别采用了5种不同的模拟 ...
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Hunter wins Heisman Trophy
SK president impeached
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Settle sexual assault suit
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Defamation suit settlement
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Pearl Harbor survivor dies
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Becomes Georgia's pres
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