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)(huì)議________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)______________，金笛短信