皇冠体育app's 'milestone' in deep-sea research
By LIU XIAOLI (皇冠体育app Daily) Updated: 2016-08-13 07:58
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Tan Suo Yi Hao, the mother ship of a 4,500-meter manned submersible, returns to her home port of Sanya, Hainan province, on Friday after completing her maiden voyage.[Photo/Xinhua] |