キーワード: 即時(shí)通訊________，企業(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)_____________，金笛短信