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quasi-stationary electromagnetic field
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quasi-stationary electromagnetic field
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工学
似稳电磁场
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quasi-stationary electromagnetic field
似稳电磁场
交变电流的频率较低时,在电流附近,与之相距比该频率的电磁波在真空中的波长少得多的区域内,可以忽略电磁场的推迟效应,这样的区域中的电磁场即为似稳场或准稳场。
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agricultural hydrological characteristics of soil
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agricultural information institute of CAAS
Agricultural Information Institute,Chinese Academy of Agricultural Science
agricultural information management standards
agricultural information management standards, AIMS
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agricultural information resources
agricultural information service
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agricultural information technology
agricultural information transmission
agricultural informatization policy
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