用于电力行业的文档，是电力载波通讯的协议（PLC），主要是电能计量。-Documents for the power industry is a power line carrier communication protocol (PLC), mainly energy metering.

自动抄表系统低层通信协议IEC62056中文翻译稿，出口电能表开发必备。 第4部分：基于HDLC协议的链路层-Automatic meter reading system lower communication protocol IEC62056 Chinese translation draft, export watt-hour meter development necessary. Part 4: based on HDLC protocol link layer