キーワード: 即時(shí)通訊_________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通_________________，龍笛即時(shí)通________________，移動(dòng)辦公________________，集成開(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)