An air flow regulation valve of used on the environmental control system of a Comac C919, on display by Liebherr at the Paris Air Show 2013.
<a href="//commons.wikimedia.org/wiki/User:Ariadacapo" title="User:Ariadacapo">Olivier Cleynen</a>
<span class="int-own-work" lang="en">Own work</span>