这是一本很难下载到得《列车牵引计算规程》，在电力牵引和电车动力行业应用，适合于研究列车的人员下载。-This is a very difficult to download to get a point of order, in the electric traction and the tram power industrial applications, suitable for research train personnel to download.

运用规程法计算输电线中线路防雷计算的软件-The use of a point of order method to calculate the transmission lines in the line lightning calculation software

电力行业继电保护装置运行相关规程，是规范类资料，是220-750kv的。-Power industry protection devices related to the operation procedures are standardized categories of information, is 220-750kv of.