Schlüsselwort: 即時(shí)通訊___________，企業(yè)(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)(fā)_____，金笛短信