{TAIL ~ A plunger} is disposed in {HEAD ~ the valve body} and is reciprocated in the bore 
{ TAIL ~ A plunger } is disposed in { HEAD ~ the valve body } and is reciprocated in the bore
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH