“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	parabolic motion parabolic net parabolic net of circles parabolic net of lines parabolic net of spheres parabolic operator parabolic orbit parabolic parabola parabolic partial differential equation parabolic pencil parabolic pencil of circles parabolic pencil of lines parabolic pencil of rays parabolic pencil of spheres parabolic perspectivity parabolic plane parabolic point parabolic potential parabolic quadratic hypersurface parabolic quadratic surface parabolic radio telescope parabolic ray parabolic reflector parabolic refractive index optical fiber parabolic region

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