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