{HEAD ~ This reduction state} is sustained until the desired effects are obtained and {TAIL ~ the temperature} may be held to lengthen this reduction 
is sustained until
{ HEAD ~ This reduction state } is sustained until the desired effects are obtained and { TAIL ~ the temperature } may be held to lengthen this reduction
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH