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