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earth-ionosphere waveguide radio wave propagation
释义
earth-ionosphere waveguide radio wave propagation
Encyclopedia
工学
电离层电波传播
释
earth-ionosphere waveguide radio wave propagation
地-电离层波导电波传播
地表层与低电离层(白天为D层,夜间为E层下部)所构成的同心球壳空间,以类似于微波平行金属板波导的机理,引导甚低频(3~30千赫)和极低频(0.3~3千赫)电波进行远距离直至全球范围的传播。
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kaleidophone
kaleidoscope
Kaleidoscope of Splendors, copper letter press by Hua Sui (1492), fifth year of the Hongzhi era, Ming Dynasty
kaleidoscopic glass
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K-algebra
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kaliberringes
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