A fast-growing shipyard in China has built the world's first 'round' deepwater drilling rig, which can pump out oil even from freezing seawaters.
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机译：@@ A fast-growing shipyard in China has built the world's first "round" deepwater drilling rig,which can pump out oil even from freezing seawaters.The US$600-million rig was delivered into service at the end of June this year to Norwegian Oilfield services group Sevan Marine,which has contracted the rig to Petrobras,Brazil's state-owned oil company.
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