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