... zone refining of chemicals 化学试剂区域精炼 continuous zone refining 连续区熔提纯 zone refining technique 区域精炼法 ...
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These metals may be purified by a technique called zone refining .
这些金属可以用所谓“逐区提纯法”来提纯。
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These metals may be purified by a technique called zone refining.
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