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