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