DMR 标准 part1-part4
ElectromagneticcompatibilityandRadiospectrumMatters(ERM);DigitalMobileRadio(DMR)Systems;Part1:DMRAirInterface(AI)protocolPart2:DMRvoiceandgenericservicesandfacilitiesPart3:DMRdataprotocolPart4:DMRtrunkingprotocol
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