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