“lowest useful high frequency”的概念、定义、翻译、参考文献-科学参考

单词	lowest useful high frequency
释义	lowest useful high frequency [`lō·ǝst ¦yüs·fǝl `hī ´frē·kwǝn·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.
随便看	stiffness reactance stigma stigmatic stigmatic concave grating stigmatism stilb Stilbaceae Stilbellaceae stilbene stilbesterol stilbite stile Stiles method stiletto still stillage stillbirth stilling basin stilling box stillingia oil Still's disease stillstand still water still-water level still wax

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