粒度:4#:1-3μm 6#:5-8μm 松比:4#:0.55g/cm3 6#:2.73g/cm3 化学成分:4#:C≤0.1% O≤0.1% Ni≥99.9% 6#:C≤0.075% O≤0.1% Ni≥99.9%