The enclosure is mounted removably on the support, by fitting its lower face, intended to receive the gaseous mixture, onto a bearing piece of the support, and the enclosure is autonomous in terms of energy supply and carries {HEAD ~ means} of storing {TAIL ~ the gases} that are intended to form the gaseous mixture 
of storing
The enclosure is mounted removably on the support , by fitting its lower face , intended to receive the gaseous mixture , onto a bearing piece of the support , and the enclosure is autonomous in terms of energy supply and carries { HEAD ~ means } of storing { TAIL ~ the gases } that are intended to form the gaseous mixture
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