Schema eines <a href="https://de.wikipedia.org/wiki/D%C3%BCker" class="extiw" title="de:Düker">Dükers</a>.
<a href="//commons.wikimedia.org/wiki/User:Patrick87" title="User:Patrick87">Patrick87</a>
2014-03-02
<span class="int-own-work" lang="en">Own work</span>