data switching exchangedata terminal equipmentdata terminal redydata tone multiple frequnencydata transferdata transmission systemdata transmitterdata typesdata under voicedatabase management programdatagramdatagram servicedatumdatum linedatum nodedaylightdbdb meterdbcdbfdbidbkdbmodbmopdbmpdbpdbrndbrncdbrncodbv dbxdbwdcdc amplifierdc couplingdc dc converterdc generatordc inserterdc magnetic biasingdc motordc offsetdc parametricsdc permanent magnet motordc power supplydc restorerdccomponetdcedcrdcself synchromous systemdctldda
