キーワード: 即時(shí)(shí)(shí)通訊____，企業(yè)(yè)(yè)(yè)溝通_______，龍笛即時(shí)(shí)(shí)通____________，視頻會(huì)(huì)議__，集成開發(fā)(fā)(fā)(fā)_______，手機(jī)(jī)(jī)(jī)端