キーワード: 即時(shí)(shí)通訊____________________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通___________，龍笛即時(shí)(shí)通_______________，視頻會(huì)議___________________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)__________________，手機(jī)(jī)端