All parts, percentages and {TAIL ~ ratios} used herein are expressed by {HEAD ~ weight} unless otherwise specified 
All parts , percentages and { TAIL ~ ratios } used herein are expressed by { HEAD ~ weight } unless otherwise specified
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH