For the remainder, {HEAD ~ the powder} can contain the conventional impurities of {TAIL ~ a steel melt} 
For the remainder , { HEAD ~ the powder } can contain the conventional impurities of { TAIL ~ a steel melt }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL