Product name: 

Maintenance of Electrification Lines (Overhead contact lines for conventional and rail gauge systems, Railway transformation centers and High voltage power lines) to Adif´s North sub-directorate

Description: 

Maintenance of ADIF´s electrification facilities including: 2,080 kilometers of Overhead Contact Line, 80 Traction Substations and 487 Kilometers of high voltage lines.

Web: 

http://www.semi.es