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中波传播
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中波传播
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电离层电波传播
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medium wave propagation
中波传播
波长从1000米到100米或频率从300千赫到3兆赫的无线电波的传播。
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national technical innovation system
national technical means
National Television of Kampuchea
national territory
national territory spatial planning
"National Theater"
National Theater Company of China
National Theater Company of Korea
National Theater of the Hill
National Theatre
National Theatre of Cuba
National Theatre of Greece
National Theatre of Korea
National Theatre of Northern Greece
National Theatre of Pécs
National Theatre of Sao Carlos
National Theatre of Scotland
national timber security base
National Time and Frequency Metrology Center
national time scale primary standard
National Time Service Center. CAS
National traditional sports
National Training Course for Audio-visual Education Personnel
national training team
National Transcotinental Railway
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