China's unmanned submersible Qianlong 3 to conduct first dive

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China's self-developed 4,500-meter-level unmanned submersible Qianglong 3 will conduct its first dive in the South China Sea on Friday.

XinhuaUpdated: April 20, 2018

Members of the Qianlong 3 research group check the unmanned submersible before the dive on April 19, 2018. [Photo/Xinhua]

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