Angle steel frame
Zhangbei - Zhang Nan double back 500kV Line Project

Zhangbei, Zhang Nan 500kV Double Circuit Line Project in Zhangjiakou, Shangyi, Zhangbei Kangbao 500kV project (hereinafter referred to as the "three four line" project) is an important part of the project is the national Power Grid Corp to implement energy intensive development, the construction of wind power energy to establish channel engineering.