A processor, connected to {HEAD ~ each} of {TAIL ~ the pressure sensors}, sorts a relative difference between the signals supplied by the sensors during dust filling 
of
A processor , connected to { HEAD ~ each } of { TAIL ~ the pressure sensors } , sorts a relative difference between the signals supplied by the sensors during dust filling
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH