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天宫二号如期“回家” 六大精彩瞬间难忘
source link: https://tech.sina.com.cn/d/s/2019-07-20/doc-ihytcerm4937858.shtml
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新华社北京7月19日电题：天宫二号如期“回家”六大精彩瞬间难忘新华社记者李国利、喻菲、张瑞杰天宫二号是我国第一个真正意义上的太空实验室，由实验舱和资源舱组成，总长10.4米，舱体最大直径3.35米，于2016年9月15日发射入轨，设计在轨寿
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