High-pressure pipes feeding the six turbines of the Chandoline station of the Grande Dixence power plant in Sion.
Unknown author<span style="display: none;">Unknown author</span>
ETH-Bibliothek Zürich, Bildarchiv, Ans_05144-01-017-AL, <a rel="nofollow" class="external free" href="https://doi.org/10.3932/ethz-a-000038596">http://doi.org/10.3932/ethz-a-000038596</a>