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)(huì)議_______________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)__________________，手機(jī)(jī)(jī)(jī)端