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