... four fold-frequency subdivision 倍频 four-frequency duplex 四频又信 four-frequency dialling 四频率拨号 ...
基于6个网页-相关网页
four frequency duplex [通信] 四频双工制
four frequency duplex communication [通信] 四频双工通信
four-frequency duplex telegraphy 四频双信电报术
four frequency duplex system 四频同向双工制
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