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)(huì)議_________，集成開(kāi)(kāi)發(fā)(fā)(fā)(fā)(fā)___，金笛短信