251. 电力系统自动化 Automation of Electric Systems
252. 电力系统自动装置 Power System Automation Equipment
253. 电路测试技术 Circuit Measurement Technology
254. 电路测试技术基础 Fundamentals of Circuit Measurement Technology
255. 电路测试技术及实验 Circuit Measurement Technology & Experiments
256. 电路分析基础 Basis of Circuit Analysis
257. 电路分析基础实验 Basic Experiment on Circuit Analysis
258. 电路分析实验 Experiment on Circuit Analysis
259. 电路和电子技术 Circuit and Electronic Technique
260. 电路理论 Theory of Circuit
