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levitation melting of rare earth
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levitation melting of rare earth
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工学
稀土金属精炼提纯
释
levitation melting of rare earth
悬浮熔炼法
采用电磁力悬浮技术使熔融的金属熔液悬浮起来,不与坩埚接触以获得高洁净度的熔炼方法。
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roak
Roald Amundsen
Roald Hoffmann
roaming
Roaming along the Pond
roaming reaction
Roamnce at the Turning of Five Dynasties and Northern Song
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