Announcement Of The Public Business Entity Administrador De Infraestructuras Ferroviarias (Adif), Which Rectifies The Information Regarding The Maximum Number Of Lots That Can Be Awarded To A Single Bidder, In The Contracting Procedure Of The "Framework Agreement For The Execution Of Works Of Improvement Of Masonry Lining Walls In The General Interest Railway Network (Rfig) Managed By Adif. (3 Lots)". ( (EXPIRED)