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