S-121 set of Renfe-MD, seen leaving Segovia-Guiomar on Avant 8188 (Segovia-Guiomar ---> Madrid-Chamartín).
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At this stage, the trainset is about to enter the Guadarrama Tunnel (28.7km, see background).
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Segovia-Guiomar.
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6th June 2009.
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P.L. Guillemin (plguillemin@yahoo.fr)