Bidding Announcement Of: Adif -Administration Terch. Object: Maintenance Of Traction Energy Facilities: Contact Airline, Telemando Of Energy, Substations, Self-Transformation Centers And Associated Systems Of Lav Nortosa, Sections: Madrid-Zaragoza-Barcelona-Frontera French And Zaragoza-Huesca. File: 2.25/21506.0013.