The longitudinal movement of the piston 96 is limited in one direction by the top of the piston 98 and in {HEAD ~ the opposite direction} by {TAIL ~ ring} 102 which is also mounted within piston 98 
The longitudinal movement of the piston 96 is limited in one direction by the top of the piston 98 and in { HEAD ~ the opposite direction } by { TAIL ~ ring } 102 which is also mounted within piston 98
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH