Palavra chave: 即時(shí)通訊_________，企業(yè)(yè)(yè)(yè)(yè)(yè)(yè)溝通_____________，龍笛即時(shí)通_______________，視頻會(huì)議____________，集成開發(fā)(fā)(fā)(fā)(fā)(fā)(fā)___________________，金笛短信