Schematic of a diffusion pump.
<ul><li><a href="//commons.wikimedia.org/wiki/File:Diffusion_pump_schematic.gif" class="mw-redirect" title="File:Diffusion pump schematic.gif">Diffusion_pump_schematic.gif</a>: <a href="//commons.wikimedia.org/wiki/User:Kkmurray" title="User:Kkmurray">Kkmurray</a></li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Malyszkz" title="User:Malyszkz">Malyszkz</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Malyszkz" title="User talk:Malyszkz"><span class="signature-talk">talk</span></a>)</li></ul>
CC BY-SA 3.0
<ul><li><a href="//commons.wikimedia.org/wiki/File:Diffusion_pump_schematic.gif" class="mw-redirect" title="File:Diffusion pump schematic.gif">Diffusion_pump_schematic.gif</a></li></ul>