Palavra chave: 即時(shí)(shí)通訊_______________，企業(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)______________，手機(jī)(jī)端