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