对学生而言很通用的三相电路，适合做电机的小白们(For students, it is very common three-phase circuit, suitable for motor small white people)

用于交通事故研究及其分析预测 具有良好的预测能力机构的清理完毕来吧避雷器发大V额v(traffic accident reas in north are Jinshajiang River system, upper Yangtze River mainstream system, Wujiang River system, and Dongting Lake system of Yangtze River Basin, while areas in south are Nanpan