private directory management domain (PRDMD) 专用号码簿（目录）管理域 private dispatch system 调度专用系统 private domain name 专用域名 ..
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所谓集群通信系统，是一种具有调度功能的高级移动通信系统，它属于专用移动通信系统的领域。
Trunking communication system is a senior mobile communication system with strong commanding and distributing features, and it is one type of private communication systems.
电话调度系统是工业生产和业务活动中指挥调度的专用通信系统。
Dispatching telephone system is a special communication system in the act of commanding and dispatching in commercial manufactures and social activities.
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