キーワード: 即時(shí)(shí)通訊________，企業(yè)(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)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)