内射日本少妇,国产大屁股专区,日本在线一级,日韩无马砖区芒果

By comparing the advantages and disadvantages of the current maintenance and detection system methods, the significance of developing and applying the condition monitoring and fault diagnosis technolo...

Fan Hongtao and Zhang Yonggang, researchers of Xiangyang Power Supply Company of State Grid, pointed out in the 2nd issue of Electrical Technology in 2016 that in 220kV intelligent substations, 220kV ...

The transformer winding core deformation directly or indirectly damages the transformer, this kind of hidden trouble general electrical test can not diagnose the transformer and similar structure of p...