{HEAD ~ The exhaust valve lift mechanism} 24 may additionally include a pushrod 30 and {TAIL ~ a rocker arm} 32 
{ HEAD ~ The exhaust valve lift mechanism } 24 may additionally include a pushrod 30 and { TAIL ~ a rocker arm } 32
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH