It is very important to equip a perfect real time telephone record system in the field of electric power control.
配备一套完善的多路实时电话录音管理系统在电力调度领域极为重要。
With the development of GPRS technology in mobile communication field, it is studied that the new mobile payment system based on mobile telephone in the world.
随着通用分组无线业务（GPRS）技术在移动领域的逐步成熟，世界各国都在积极研究这项新兴的移动支付系统。
It is engaged in the field of simultaneous translating system, conference broadcasting system, telephone conference system as well as wireless education system.
从事专业生产同声传译系统、会议扩声系统、无线电教系统等设备。
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