{HEAD ~ The substrate} may be made from {TAIL ~ Nickel Base forgings} or Titanium base forgings 
{ HEAD ~ The substrate } may be made from { TAIL ~ Nickel Base forgings } or Titanium base forgings
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH