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)(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)_________________，金笛短信