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