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