The pneumatic supply 52 is preferably {HEAD ~ a commercial gas cylinder} easily available at {TAIL ~ nearly all industrial facilities}, and the regulator 53 is preferably a manual pressure regulator generally provided with such a gas cylinder 
The pneumatic supply 52 is preferably { HEAD ~ a commercial gas cylinder } easily available at { TAIL ~ nearly all industrial facilities } , and the regulator 53 is preferably a manual pressure regulator generally provided with such a gas cylinder
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