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Jiang Sheng (L), a maintenance worker, applies silicone grease to the sealing ring of the hatch cover of the manned submersible Jiaolong on Oct. 11, 2026.
China's manned deep-sea submersible Jiaolong has completed its 473rd dive during an ongoing deep-sea scientific research mission through joint efforts of researchers, maintenance workers, and the crew. (Xinhua/Li Xin)
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