Schlüsselwort: 即時(shí)(shí)(shí)通訊___________，企業(yè)(yè)(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)(fā)(fā)__，金笛短信