Image for <a href="//commons.wikimedia.org/wiki/BSicon" title="BSicon">BSicon</a> diagrams - parallel lines in tunnel: station end + line through, set u
<ul><li><a href="//commons.wikimedia.org/wiki/File:BSicon_utvBHF-STR.svg" title="File:BSicon utvBHF-STR.svg">BSicon utvBHF-STR.svg</a>: <a href="//commons.wikimedia.org/wiki/User:YLSS" title="User:YLSS">YLSS</a></li></ul>
derivative work: <a href="//commons.wikimedia.org/w/index.php?title=User:Yak79_2.0&amp;action=edit&amp;redlink=1" class="new" title="User:Yak79 2.0 (page does not exist)">Yak79 2.0</a>
Own work based on: <a href="//commons.wikimedia.org/wiki/File:BSicon_utvBHF-STR.svg" title="File:BSicon utvBHF-STR.svg">BSicon utvBHF-STR.svg</a>: <a href="//commons.wikimedia.org/wiki/File:BSicon_utvBHF-STR.svg" class="image"><img alt="BSicon utvBHF-STR.svg" src="https://upload.wikimedia.org/wikipedia/commons/thumb/5/5e/BSicon_utvBHF-STR.svg/50px-BSicon_utvBHF-STR.svg.png" decoding="async" width="50" height="50" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/5/5e/BSicon_utvBHF-STR.svg/75px-BSicon_utvBHF-STR.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/5/5e/BSicon_utvBHF-STR.svg/100px-BSicon_utvBHF-STR.svg.png 2x" data-file-width="500" data-file-height="500"></a>