Schlüsselwort: 即時(shí)(shí)(shí)通訊__，企業(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)(kāi)發(fā)(fā)(fā)(fā)