| 单词 |
lowest useful high frequency |
| 释义 |
lowest useful high frequency lowest useful high frequency[′lō·əst ¦yüs·fəl ′hī ‚frē·kwən·sē] (communications) The lowest high frequency that is effective at a specified time for ionospheric propagation of radio waves between two specified points. Abbreviated LUHF. |
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