キーワード: 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)________________，金笛短信