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出口许可证
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出口许可证
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propagation forecasting
propagation ground
propagation length
propagation loss
propagation medium
propagation notice
propagation of ground wave
propagation of high frequency radio wave
propagation of low frequency (LF) radio wave
propagation of low frequency radio wave
propagation of microwave
propagation of tea cuttings
propagation of very high frequency (VHF)
propagation of very low frequency (VLF)
propagation path
propagation power
propagation power loss
propagation rate
propagation ratio
propagation rule
propagation structure
propagation time
propagation time delay
propagation vector
propagation velocity
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