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