Rohde &amp; Schwarz
<a rel="nofollow" class="external text" href="https://web.archive.org/web/20161025120940/http://www.panoramio.com/user/969909?with_photo_id=87300110">Richard Mayer</a>
CC BY 3.0
<a rel="nofollow" class="external free" href="https://web.archive.org/web/20161025120933/http://www.panoramio.com/photo/87300110">https://web.archive.org/web/20161025120933/http://www.panoramio.com/photo/87300110</a>