Tunnel construction. Workers laying concrete on the construction site of the Sommand tunnel,France. This tunnel is being built to protect the D308 road from the many rockfalls and avalanches that plaque this section of its route through the Alps | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Look At Sciences / Actophoto |
Bildgröße: | 5125 px × 3416 px |
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