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单词 chromium dioxide
释义

WordReference Random House Unabridged Dictionary of American English © 2024
chromium dioxide, 
  1. Chemistrya strongly magnetic, black, semiconducting substance, CrO2, used as the active material in a type of recording tape.

Collins Concise English Dictionary © HarperCollins Publishers::
chromium dioxide n
  1. a chemical compound used as a magnetic coating on cassette tapes; chromium(IV) oxide. Formula: CrO2
    Also called (not in technical usage): chrome dioxide
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