Schlüsselwort: 即時(shí)(shí)通訊____________________，企業(yè)(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)(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)____________，金笛短信