For example, Fe, Co, Ni, Cu, Al, Mg, Au, Ag, Pt, W, Mo, Ti, Mn, Pd, Bi, Cr, V, Zn, Fe-Ni alloy, Fe-Co alloy 1Cr 18Ni 9Ti (Stainless steel), W-Ni-Fe alloy and W-Cualloy etc. The average particle size is 30-70nm, and the purity is more than 99.9% If this o
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