{HEAD ~ Each} of the eccentrics is encompassed by {TAIL ~ a power transmission ring} and a pair of parallel cranks are journaled on opposite sides of each transmission ring by a crankpin extending through the transmission ring parallel to the power shaft 
is encompassed by
{ HEAD ~ Each } of the eccentrics is encompassed by { TAIL ~ a power transmission ring } and a pair of parallel cranks are journaled on opposite sides of each transmission ring by a crankpin extending through the transmission ring parallel to the power shaft
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL 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 OTH OTH