产品线涵盖显示器、监控系统、视讯多媒体系统、电梯对讲机及其他周边零配件，如电子式到楼铃等。
Our product line including Displays, Elevator Monitoring System, Elevator Information Multi-media System, Intercom and other accessories like Electronic Chime.
主营产品有案例部件、挖掘系统、变频器、光幕、对讲机、编码器等等。
The main products are safety components, control system, frequency converter. light curtains, intercom, encoders, and so on.
本文所研究的TDD数字对讲机，它为无绳电话、集群通信系统提供了另一种基于TDD方式的选择方案。
The digital handset studied in this thesis can provide another resolvent based on TDD for the Trunked communication system and cordless phone system.
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