キーワード: 即時(shí)(shí)(shí)通訊_，企業(yè)(yè)(yè)溝通____，龍笛即時(shí)(shí)(shí)通_____，視頻會(huì)(huì)(huì)議____，集成開(kāi)(kāi)(kāi)發(fā)(fā)(fā)________，金笛短信