China's first domestically developed submarine oil drilling equipment – subsea Christmas (Xmas) tree. It is a core piece of equipment used in subsea production systems in the petroleum industry. (Photo/Courtesy of CNOOC)
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China's first domestically developed submarine oil drilling equipment – subsea Christmas (Xmas) tree. It is a core piece of equipment used in subsea production systems in the petroleum industry. (Photo/Courtesy of CNOOC)
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