{HEAD ~ A first pair} of {TAIL ~ engagement rods} 36, 38 are fixedly attached to first plate 14 
of
{ HEAD ~ A first pair } of { TAIL ~ engagement rods } 36 , 38 are fixedly attached to first plate 14
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH