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Lyon-Turin (TAV) High-speed railway tunnel construction site, Saint-Martin La Porte, Savoie, Auvergne-Rhône-Alpes Region, France Stock Photo - Alamy
![Typical geological conditions at the face of the Saint Martin La Porte... | Download Scientific Diagram Typical geological conditions at the face of the Saint Martin La Porte... | Download Scientific Diagram](https://www.researchgate.net/publication/259781403/figure/fig9/AS:668431535857667@1536377905450/Typical-geological-conditions-at-the-face-of-the-Saint-Martin-La-Porte-access-adit.png)
Typical geological conditions at the face of the Saint Martin La Porte... | Download Scientific Diagram
![Lyon-Turin (TAV) High-speed railway tunnel construction site, Saint-Martin La Porte, Savoie, Auvergne-Rhône-Alpes Region, France Stock Photo - Alamy Lyon-Turin (TAV) High-speed railway tunnel construction site, Saint-Martin La Porte, Savoie, Auvergne-Rhône-Alpes Region, France Stock Photo - Alamy](https://c8.alamy.com/comp/TRJXGT/lyon-turin-tav-high-speed-railway-tunnel-construction-site-saint-martin-la-porte-savoie-auvergne-rhne-alpes-region-france-TRJXGT.jpg)
Lyon-Turin (TAV) High-speed railway tunnel construction site, Saint-Martin La Porte, Savoie, Auvergne-Rhône-Alpes Region, France Stock Photo - Alamy
![Lyon-Turin (TAV) High-speed railway tunnel construction site, Saint-Martin La Porte, Savoie, Auvergne-Rhône-Alpes Region, France Stock Photo - Alamy Lyon-Turin (TAV) High-speed railway tunnel construction site, Saint-Martin La Porte, Savoie, Auvergne-Rhône-Alpes Region, France Stock Photo - Alamy](https://c8.alamy.com/comp/TRJXH8/lyon-turin-tav-high-speed-railway-tunnel-construction-site-saint-martin-la-porte-savoie-auvergne-rhne-alpes-region-france-TRJXH8.jpg)