Schlüsselwort: 即時(shí)(shí)通訊__，企業(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)，手機(jī)(jī)端