Bo Xu, Yong Xu, Jiaqing Liang, Chenhao Xie, Bin Liang, Wanyun Cui, and Yanghua Xiao. CN-DBpedia: A Never-Ending Chinese Knowledge Extraction System. In International Conference on Industrial, Engineering and Other Applications of Applied Intelligent Systems, pp. 428-438. Springer, Cham, 2017.
| 外文名称 | Domestic Direct Dial | |
| 拨打方式 | 国内字冠0+长途区号+用户号码 | |
| 简称 | DDD | |
| 类型 | 国内直拨国内长途直拨电话业务 |
| 标签 | 非地理 |