Intheclusterscommunicationsystem,theuseru sesfixedfrequencywhilecalling.Theuserstat ioncanonlybeturnedtoacertainfrequency,wor kinthischannel.Ifthechannelisoccupied,the stationnotbeabletoautomaticallyselectothe ridlechanneltowork. ( )
发布于 2021-03-14 17:27:14
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