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)(kāi)發(fā)(fā)(fā)(fā)(fā)(fā)(fā)