Schlüsselwort: 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)議，集成開(kāi)發(fā)(fā)(fā)________，金笛短信