Tunel de Pajares
Cabeza tuneladora:
http://img44.imageshack.us/img44/3241/cabezapajares.jpg
Tuneladoras:
http://img70.imageshack.us/img70/313...lespajares.jpg http://img199.imageshack.us/img199/8244/pajares.jpg
Tunel Guadarrama:
http://img218.imageshack.us/img218/4...guadarrama.jpg
Saludos