Schlüsselwort: 即時(shí)(shí)通訊_____，企業(yè)(yè)(yè)(yè)溝通____，龍笛即時(shí)(shí)通_____，視頻會(huì)議，集成開(kāi)發(fā)(fā)(fā)(fā)____________，金笛短信