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)議____，集成開(kāi)發(fā)(fā)(fā)___，手機(jī)(jī)(jī)端