キーワード: 即時(shí)(shí)(shí)通訊____，企業(yè)(yè)(yè)溝通______，龍笛即時(shí)(shí)(shí)通____，視頻會(huì)(huì)(huì)議_，集成開(kāi)(kāi)(kāi)發(fā)(fā)(fā)____，手機(jī)(jī)(jī)端