45° curve, in tunnel
<ul><li><a href="//commons.wikimedia.org/w/index.php?title=File:BSicon_ut%C3%9CWl.svg&amp;action=edit&amp;redlink=1" class="new" title="File:BSicon utÜWl.svg (page does not exist)">BSicon utÜWl.svg</a>: *<a href="//commons.wikimedia.org/w/index.php?title=File:BSicon_ut%C3%9CWol.svg&amp;action=edit&amp;redlink=1" class="new" title="File:BSicon utÜWol.svg (page does not exist)">BSicon utÜWol.svg</a>: <a href="//commons.wikimedia.org/wiki/User:AlgaeGraphix" title="User:AlgaeGraphix">AlgaeGraphix</a></li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:AlgaeGraphix" title="User:AlgaeGraphix">AlgaeGraphix</a></li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Useddenim" title="User:Useddenim">Useddenim</a></li></ul>
2011-02-24
Own work based on: <a href="//commons.wikimedia.org/w/index.php?title=File:BSicon_ut%C3%9CWl.svg&amp;action=edit&amp;redlink=1" class="new" title="File:BSicon utÜWl.svg (page does not exist)">BSicon utÜWl.svg</a>