As with {HEAD ~ the refractory metal} in {TAIL ~ the first coating}, the metal, if present, may be in the form of particulate metal or atomically dispersed metal or both 
in
As with { HEAD ~ the refractory metal } in { TAIL ~ the first coating } , the metal , if present , may be in the form of particulate metal or atomically dispersed metal or both
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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