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