キーワード: 即時(shí)通訊_______________________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通_______________________，龍笛即時(shí)通______________________，視頻會(huì)議__________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)_______________________，手機(jī)(jī)端