Palavra chave: 即時(shí)(shí)通訊______________，企業(yè)(yè)(yè)(yè)(yè)溝通_______________，龍笛即時(shí)(shí)通______，視頻會議___________，集成開發(fā)(fā)(fā)(fā)(fā)______，手機(jī)(jī)端