A first pair of {HEAD ~ encasement rods} are fixedly attached to {TAIL ~ the first plate} 
A first pair of { HEAD ~ encasement rods } are fixedly attached to { TAIL ~ the first plate }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL