キーワード: 即時(shí)(shí)通訊____，企業(yè)(yè)(yè)(yè)(yè)溝通_________，龍笛即時(shí)(shí)通________，視頻會(huì)(huì)議____，集成開(kāi)(kāi)發(fā)(fā)(fā)(fā)(fā)___________，金笛短信