Mot-clefs : 即時(shí)(shí)(shí)(shí)通訊____，企業(yè)(yè)(yè)(yè)溝通____，龍笛即時(shí)(shí)(shí)(shí)通___________，視頻會(huì)(huì)(huì)(huì)議___________，集成開(kāi)(kāi)(kāi)發(fā)(fā)(fā)(fā)_________，手機(jī)(jī)(jī)(jī)端