The controller varies the output pressure of the pressure source, e.g. a rotary compressor, based, at least in part, on {HEAD ~ the head position information} provided by {TAIL ~ the head position sensor} 
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The controller varies the output pressure of the pressure source , e.g. a rotary compressor , based , at least in part , on { HEAD ~ the head position information } provided by { TAIL ~ the head position sensor }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL