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