This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Amstegschieber. Kugelschieber im Wasserkraftwerk Amsteg Ball valve at Amsteg power plant own bahnbilder ch Kabelleger David Gubler Bahnbilder ch Kraftwerk Amsteg Ballvalves
Page 2023 Free-images.com. All images are Public Domain