Schlüsselwort: 即時(shí)通訊_____，企業(yè)(yè)(yè)(yè)(yè)(yè)溝通______________，龍笛即時(shí)通___________，視頻會(huì)議_____________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)_________，手機(jī)(jī)端