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