... sieve 45µm,%(m/m) ≤ 0.08 11 Resistance of aqueous extract,Ωm ≥ 20 12 Fe2O3,ppm ≤100 ... Dioxide R/A State-owned enterprises.By the end of 2010, our productions have been exported to over 30 ... international annual turnover more than USD5 million,68% of the total annual sales revenue. Depend on high ...