The temperature of the PMA blend during mixing should be {TAIL ~ a temperature} at which {HEAD ~ the blend} is handleable 
at is handleable
The temperature of the PMA blend during mixing should be { TAIL ~ a temperature } at which { HEAD ~ the blend } is handleable
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL REL OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL