Schlüsselwort: 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)