| 释义 |
zone meltingn.（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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