单词 | zone melting crystallization |
释义 | zone melting crystallization [`zōn ¦mel·tiŋ ´krist·ǝl·ǝ`zā·shǝn] CHEMICAL ENGINEERING A method for purification of crystalline solids; the sample, packed in a narrow column, is heated so that a molten zone passes down through the sample, carrying impurities with it. |
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