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