The carbon content of the powder mixture is no more than 0.05% by weight and the reduction annealing takes place in {HEAD ~ a temperature range} of {TAIL ~ 850°} 950° C 
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The carbon content of the powder mixture is no more than 0.05 % by weight and the reduction annealing takes place in { HEAD ~ a temperature range } of { TAIL ~ 850 ° } 950 ° C
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH