{HEAD ~ The longitudinal movement} of piston 96 causes {TAIL ~ longitudinal movement} of valve pin 31 which is threadably mounted to piston 96 at 100 
causes
{ HEAD ~ The longitudinal movement } of piston 96 causes { TAIL ~ longitudinal movement } of valve pin 31 which is threadably mounted to piston 96 at 100
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH