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