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单词 zone melting
释义

WordReference Random House Unabridged Dictionary of American English © 2024
zone melt′ing, 
  1. Metallurgya process of purifying any of various metals and other materials, as germanium or silicon, by passing it in bar form through an induction coil. Also called zone refin′ing. Cf. cage zone melting. 
  • 1955–60

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