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)(dòng)辦公____________，集成開(kāi)(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)