750kV and below transmission line Steel tower As the traditional equipment of transmission line, steel tower is
featured of widely application, standardized design and matured
techniques, showing the advantage and universal applicability in
miscellaneous voltages and transmission distance. The steel towers
are commonly used in key power structures of State Grid. In 750kV
Guanting-Lanzhou trail transmission line, the products enjoy a
prestige from owner, supervision units and construction units.