Palavra chave: 即時(shí)(shí)(shí)通訊_______________________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通_________________________，龍笛即時(shí)(shí)(shí)通_______________________________，視頻會(huì)(huì)議____________________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)(fā)____________________，手機(jī)(jī)(jī)(jī)(jī)(jī)端