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单词 medium frequency
释义

WordReference Random House Unabridged Dictionary of American English © 2024
medium frequency, [Radio.]
  1. Radio and Televisionany frequency between 300 and 3000 kilohertz. Abbr.: MF
  • 1915–20

Collins Concise English Dictionary © HarperCollins Publishers::
medium frequency n
  1. a radio-frequency band or radio frequency lying between 3000 and 300 kilohertz
    Abbreviation: MF
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