Schlüsselwort: 即時(shí)(shí)通訊_____，企業(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)_____，金笛短信