{HEAD ~ The variation} in stiffness may provide stiffer projections at {TAIL ~ the gap} in the split ring, i.e. towards the ends of the strip of material that are curved towards each other to form the ring 
{ HEAD ~ The variation } in stiffness may provide stiffer projections at { TAIL ~ the gap } in the split ring , i.e. towards the ends of the strip of material that are curved towards each other to form the ring
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH 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