“sky wave propagation for low frequency”的概念、定义、翻译、参考文献-科学参考

单词	sky wave propagation for low frequency
释义	sky wave propagation for low frequency Encyclopedia 工学电离层电波传播释 sky wave propagation for low frequency低频天波传播地面发射的频率为30～300千赫的无线电波，经电离层反射再回到地面的传播方式。
随便看	variable compensation variable component variable compression ratio variable condenser variable control chart variable coordinate variable cross-section charge Variable Crystal Filter variable cycle engine variable cycle engine turbine variable DB white dwarfs variable density liquid method variable-density sound track variable design variable-directions method variable displacement variable domain variable endpoint variable-free expression variable frequency AC electrical power generating system variable-frequency Motor variable-gain amplifier variable gene variable-geometry turbine stator Variable Geometry Turbocharge and Exhaust Gas Re-circulation Control

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