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对流层波导电波传播
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对流层波导电波传播
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对流层电波传播
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radio wave propagation in tropospheric radio duct
对流层波导电波传播
在某些气象条件下,对流层中可以形成具有一定强度和厚度的准水平大尺度层结,频率足够高的无线电波在适当的发射方向上,可在相当大的程度上进入其内,并如同在波导管中一样以异常低的衰减进行传播的现象。
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road section design
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roadside structure of railway
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road traffic accidents involving foreign affairs
road traffic accident social rescue fund
road traffic and transportation
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