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