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)發(fā)(fā)(fā)(fā)(fā)(fā)___________，金笛短信