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单词 zone melting
释义 zone melting【化】 区域熔炼 zone melting  zone melting  n.(名词)A purification technique for crystalline substances in which a heating system passes slowly over a bar of the material to be refined, creating a molten region that carries impurities with it across the bar.Also called  zone refining 区域熔融:结晶物质的一种净化技术,对一条待净化的原料慢慢加热,形成的熔化区域可从原料带走杂质也作  zone refining
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