Metallation may be accomplished either at {HEAD ~ that temperature} or at a lower temperature following {TAIL ~ cooling} of the slurry 
Metallation may be accomplished either at { HEAD ~ that temperature } or at a lower temperature following { TAIL ~ cooling } of the slurry
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH