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