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Chinese scientists complete crucial research in Arctic expedition
01:01

Chinese scientists made multiple achievements in hydrologic, meteorological and physical experiments and set up an ice station during their 13th expedition to the Arctic Ocean. Icebreakers are graded into different classes according to their ability to break ice. Xuelong-2 is the most powerful among all medium-sized icebreakers, which can continuously break layers of ice 1.5-meter-thick plus 0.2 meters of snow. Further research on the collision between sea ice and a ship helps optimize the design of an engineering structure at polar seas and enhance the capabilities of icebreakers in the future. 

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