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t - 厦门大学通信工程系

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电 波 传 播<br />

电 离 层 高 度 :60~:<br />

300 km<br />

单 跳 最 大 距 离 :4000:<br />

km<br />

多 跳 可 以 环 球<br />

频 率 :2:<br />

2 ~30 MHz

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