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China's unmanned submersible dives to 4,266m under sea

Xinhua | Updated: 2018-04-05 19:43
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Workers attach a flotation device to China's unmanned submersible "Hailong III" for a deep water test, on April 4, 2018. China's unmanned submersible "Hailong III" dived 4,266 meters below the sea surface in the western Pacific Ocean late Wednesday while conducting a 4,500-meter level deep water test. [Photo/Xinhua]
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