The pressure cutback means includes a second reaction chamber, defined by {HEAD ~ the relief valve spool}, which has {TAIL ~ a preselected second effective surface area} 
has
The pressure cutback means includes a second reaction chamber , defined by { HEAD ~ the relief valve spool } , which has { TAIL ~ a preselected second effective surface area }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL