Details an einer Drehmaschine (Industriemuseum / Duisburg)
<a href="//commons.wikimedia.org/wiki/User:Arglos" title="User:Arglos">Hermann A. Wiese</a>
CC BY-SA 3.0
photo taken by <a href="//commons.wikimedia.org/wiki/User:Arglos" title="User:Arglos">Hermann A. Wiese</a>