Cryogenic vacuum chamber - cryostat
<a href="//commons.wikimedia.org/w/index.php?title=User:Frako2017&amp;action=edit&amp;redlink=1" class="new" title="User:Frako2017 (page does not exist)">P.B.W. Frako-Term sp. z o.o.</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>