Bypass valve.
<a href="//commons.wikimedia.org/w/index.php?title=User:Akyeren~commonswiki&amp;action=edit&amp;redlink=1" class="new" title="User:Akyeren~commonswiki (page does not exist)">Akyeren~commonswiki</a>
2008-01-22
<span class="int-own-work" lang="en">Own work</span>