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