“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	Qiankun Wan Qianli Changsha Qianligang Shanmai Qian Ling Qianling Museum Qianling Shan Qianlingshan Park in Guiyang City Qian Lingxi Qianling Yinhao tea Qian Linzhao Qianli Shitang Qianliu，King of Wuyue Kingdom Qianlong embroidery bag of flint steel Qianlong era Qianlong style carved body enamel sacrificial statue Qian Long’s Villa of Tianjin Qian Lucan Qianlu Garden (of Yang Family) Qian Mausoleum Qian Mausoleum of Tang Dynasty Qian Mausoleum of Tang dynasty Qian Minggao Qian Mingshi Qianming Temple Qian Mingyi

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