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