{HEAD ~ Rods} 110, 110 preferably are made from {TAIL ~ a stiff resilient material}, to resist both lateral bending as well as axial twisting from torsional forces 
preferably are made from
{ HEAD ~ Rods } 110 , 110 preferably are made from { TAIL ~ a stiff resilient material } , to resist both lateral bending as well as axial twisting from torsional forces
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL 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