前端设备：一种把一些通信线路与计算机系统联接起来的传输控制单元。
Front-end device: a transmission control unit that links a number of communication lines to a computer system.
文章介绍了计算机接口和步进电动机运转的控制线路及有关软件核心编程的要点。
This paper introduces the computer interface, controlling circuit for step motors' operation and key programming points of the software.
一个完整的智能电网，需在发电站安装计算机和传感器，变电站以及电力线路信号控制中心，这样能更好地控制电力的流量。
In a smart grid, computers and sensors installed at power plants, substations and along power lines signal control centers that better manage the flow of electricity.
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