The three main methods for high purity zinc preparation, including electrolytic method, vacuum distillation, zone refining, are summarized and compared in this paper.

本文对目前高纯锌的三种主要制备方法(电解法、真空蒸馏法、区域熔炼法)进行了综述和比较。

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Then the zone refine is also discussed, and shows that zone refine can produce higher purity antimony on the basis of vacuum distillation.

在分析真空蒸馏的同时将区域提纯进行了理论分析，证明利用区域提纯技术可以在真空提纯的基础上制备纯度更高的金属锑。

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According to geologic characteristics, the vacuum preloading with prefabricated vertical drain (PVD) method was adopted to treat the soft soil in the intertidal zone.

针对潮间带的地质特点，采取真空预压法联合塑料排水板加固处理潮间带软土地基。

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"The longer the political vacuum persists, the more vulnerable Italy's bond market becomes at a time when sentiment towards the euro zone has already taken a knock" from Cyprus, said Nicholas Spiro, head of Spiro Sovereign Strategy in London.

WSJ: Italian Politician Lashes Out After Coalition Falters