{TAIL ~ Fluid communication} from the system may thereafter occur along the second flow path at the relief valve apparatus opens in {HEAD ~ response} to pressure buildup in the flow path 
{ TAIL ~ Fluid communication } from the system may thereafter occur along the second flow path at the relief valve apparatus opens in { HEAD ~ response } to pressure buildup in the flow path
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH