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天火字典

英日字典: appleton_layer

appleton layer   (TTS Sound)


The appleton_layer has 1 Senses.

  • f region, f layer, appleton layer
  • the highest region of the ionosphere (from 90 to 600 miles up) which contains the highest concentration of free electrons and is most useful for long-range radio transmission
  • 電離圏の一番高い所(上空90マイルから600マイル)で、自由電子の密度が最も高く、長距離の無線伝達に最も便利

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