Inorganic marine/offshore <a href="//commons.wikimedia.org/wiki/Firestop" title="Firestop">firestop</a> transit after successful <a href="//commons.wikimedia.org/wiki/Fire_test" title="Fire test">fire test</a> in <a href="//commons.wikimedia.org/wiki/Germany" class="mw-redirect" title="Germany">Germany</a>.
<a href="//commons.wikimedia.org/wiki/User:Achim_Hering" title="User:Achim Hering">Achim Hering</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>